Documentation/features: Add kmemleak

Replace the manually curated list for supported archs in
Documentation/dev-tools/kmemleak.rst by a Documentation/features entry.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Link: https://lore.kernel.org/r/20200627091510.28210-1-tklauser@distanz.chSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/dev-tools/kmemleak.rst

@@ -8,8 +8,6 @@ with the difference that the orphan objects are not freed but only
 reported via /sys/kernel/debug/kmemleak. A similar method is used by the
 Valgrind tool (``memcheck --leak-check``) to detect the memory leaks in
 user-space applications.
-Kmemleak is supported on x86, arm, arm64, powerpc, sparc, sh, microblaze, mips,
-s390, nds32, arc and xtensa.
 
 Usage
 -----

Documentation/features/debug/kmemleak/arch-support.txt

+#
+# Feature name:          kmemleak
+#         Kconfig:       HAVE_DEBUG_KMEMLEAK
+#         description:   arch supports the kernel memory leak detector
+#
+    -----------------------
+    |         arch |status|
+    -----------------------
+    |       alpha: | TODO |
+    |         arc: |  ok  |
+    |         arm: |  ok  |
+    |       arm64: |  ok  |
+    |         c6x: | TODO |
+    |        csky: | TODO |
+    |       h8300: | TODO |
+    |     hexagon: | TODO |
+    |        ia64: | TODO |
+    |        m68k: | TODO |
+    |  microblaze: |  ok  |
+    |        mips: |  ok  |
+    |       nds32: |  ok  |
+    |       nios2: | TODO |
+    |    openrisc: | TODO |
+    |      parisc: | TODO |
+    |     powerpc: |  ok  |
+    |       riscv: | TODO |
+    |        s390: |  ok  |
+    |          sh: |  ok  |
+    |       sparc: |  ok  |
+    |          um: |  ok  |
+    |   unicore32: | TODO |
+    |         x86: |  ok  |
+    |      xtensa: |  ok  |
+    -----------------------