bpf, docs: Use internal linking for link to netdev subsystem doc

Commit d56b0c46 ("bpf, docs: Fix link to netdev-FAQ target")
attempts to fix linking problem to undefined "netdev-FAQ" label
introduced in 287f4fa9 ("docs: Update references to netdev-FAQ")
by changing internal cross reference to netdev subsystem documentation
(Documentation/process/maintainer-netdev.rst) to external one at
docs.kernel.org. However, the linking problem is still not
resolved, as the generated link points to non-existent netdev-FAQ
section of the external doc, which when clicked, will instead going
to the top of the doc.

Revert back to internal linking by simply mention the doc path while
massaging the leading text to the link, since the netdev subsystem
doc contains no FAQs but rather general information about the subsystem.

Fixes: d56b0c46 ("bpf, docs: Fix link to netdev-FAQ target")
Fixes: 287f4fa9 ("docs: Update references to netdev-FAQ")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230314074449.23620-1-bagasdotme@gmail.com

Documentation/bpf/bpf_devel_QA.rst

@@ -128,7 +128,8 @@ into the bpf-next tree will make their way into net-next tree. net and
 net-next are both run by David S. Miller. From there, they will go
 into the kernel mainline tree run by Linus Torvalds. To read up on the
 process of net and net-next being merged into the mainline tree, see
-the `netdev-FAQ`_.
+the documentation on netdev subsystem at
+Documentation/process/maintainer-netdev.rst.
 
 
 
@@ -147,7 +148,8 @@ request)::
 Q: How do I indicate which tree (bpf vs. bpf-next) my patch should be applied to?
 ---------------------------------------------------------------------------------
 
-A: The process is the very same as described in the `netdev-FAQ`_,
+A: The process is the very same as described in the netdev subsystem
+documentation at Documentation/process/maintainer-netdev.rst,
 so please read up on it. The subject line must indicate whether the
 patch is a fix or rather "next-like" content in order to let the
 maintainers know whether it is targeted at bpf or bpf-next.
@@ -206,8 +208,9 @@ ii) run extensive BPF test suite and
 Once the BPF pull request was accepted by David S. Miller, then
 the patches end up in net or net-next tree, respectively, and
 make their way from there further into mainline. Again, see the
-`netdev-FAQ`_ for additional information e.g. on how often they are
-merged to mainline.
+documentation for netdev subsystem at
+Documentation/process/maintainer-netdev.rst for additional information
+e.g. on how often they are merged to mainline.
 
 Q: How long do I need to wait for feedback on my BPF patches?
 -------------------------------------------------------------
@@ -230,7 +233,8 @@ Q: Are patches applied to bpf-next when the merge window is open?
 -----------------------------------------------------------------
 A: For the time when the merge window is open, bpf-next will not be
 processed. This is roughly analogous to net-next patch processing,
-so feel free to read up on the `netdev-FAQ`_ about further details.
+so feel free to read up on the netdev docs at
+Documentation/process/maintainer-netdev.rst about further details.
 
 During those two weeks of merge window, we might ask you to resend
 your patch series once bpf-next is open again. Once Linus released
@@ -394,7 +398,8 @@ netdev kernel mailing list in Cc and ask for the fix to be queued up:
   netdev@vger.kernel.org
 
 The process in general is the same as on netdev itself, see also the
-`netdev-FAQ`_.
+the documentation on networking subsystem at
+Documentation/process/maintainer-netdev.rst.
 
 Q: Do you also backport to kernels not currently maintained as stable?
 ----------------------------------------------------------------------
@@ -410,7 +415,7 @@ Q: The BPF patch I am about to submit needs to go to stable as well
 What should I do?
 
 A: The same rules apply as with netdev patch submissions in general, see
-the `netdev-FAQ`_.
+the netdev docs at Documentation/process/maintainer-netdev.rst.
 
 Never add "``Cc: stable@vger.kernel.org``" to the patch description, but
 ask the BPF maintainers to queue the patches instead. This can be done
@@ -685,7 +690,6 @@ when:
 
 .. Links
 .. _Documentation/process/: https://www.kernel.org/doc/html/latest/process/
-.. _netdev-FAQ: https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html
 .. _selftests:
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/tools/testing/selftests/bpf/
 .. _Documentation/dev-tools/kselftest.rst: