media: admin-guide: make clear about PCI subsystem IDs

On several parts of the document, it mentions "PCI ID", when
it is actually referring to the subsystem's part of the PCI
ID.

Change the language to let it be clear.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/admin-guide/media/bt8xx.rst

@@ -70,7 +70,7 @@ frontend and backend modules will be loaded automatically.
 
 Exceptions are:
 
-- Old TV cards without EEPROMs, sharing a common PCI ID;
+- Old TV cards without EEPROMs, sharing a common PCI subsystem ID;
 - Old TwinHan DST cards or clones with or without CA slot and not
   containing an Eeprom.
 

Documentation/admin-guide/media/bttv-cardlist.rst

@@ -12,7 +12,7 @@ BTTV cards list
 
    * - Card number
      - Card name
-     - PCI IDs
+     - PCI subsystem IDs
 
    * - 0
      -  *** UNKNOWN/GENERIC ***

Documentation/admin-guide/media/cardlist.rst

@@ -183,13 +183,16 @@ is actually composed by two parts:
 	- Vendor ID and device ID;
 	- Subsystem ID and Subsystem device ID;
 
-The ``lspci -nn`` command allows identifying the vendor/device PCI IDs::
+The ``lspci -nn`` command allows identifying the vendor/device PCI IDs:
+
+.. code-block:: none
+   :emphasize-lines: 4
 
     $ lspci -nn
     ...
+    00:0a.0 Multimedia controller [0480]: Philips Semiconductors SAA7131/SAA7133/SAA7135 Video Broadcast Decoder [1131:7133] (rev d1)
     00:0b.0 Multimedia controller [0480]: Brooktree Corporation Bt878 Audio Capture [109e:0878] (rev 11)
     01:00.0 Multimedia video controller [0400]: Conexant Systems, Inc. CX23887/8 PCIe Broadcast Audio and Video Decoder with 3D Comb [14f1:8880] (rev 0f)
-    01:01.0 Multimedia controller [0480]: Philips Semiconductors SAA7131/SAA7133/SAA7135 Video Broadcast Decoder [1131:7133] (rev d1)
     02:01.0 Multimedia video controller [0400]: Internext Compression Inc iTVC15 (CX23415) Video Decoder [4444:0803] (rev 01)
     02:02.0 Multimedia video controller [0400]: Conexant Systems, Inc. CX23418 Single-Chip MPEG-2 Encoder with Integrated Analog Video/Broadcast Audio Decoder [14f1:5b7a]
     02:03.0 Multimedia video controller [0400]: Brooktree Corporation Bt878 Video Capture [109e:036e] (rev 11)
@@ -202,17 +205,21 @@ The subsystem IDs can be obtained using ``lspci -vn``
 
     $ lspci -vn
     ...
-	01:01.0 0480: 1131:7133 (rev d1)
-	        Subsystem: 1461:f01d
-	        Flags: bus master, medium devsel, latency 32, IRQ 209
-	        Memory at e2002000 (32-bit, non-prefetchable) [size=2K]
-	        Capabilities: [40] Power Management version 2
+	00:0a.0 0480: 1131:7133 (rev d1)
+		Subsystem: 1461:f01d
+		Flags: bus master, medium devsel, latency 32, IRQ 209
+		Memory at e2002000 (32-bit, non-prefetchable) [size=2K]
+		Capabilities: [40] Power Management version 2
     ...
 
-Unfortunately, sometimes the same PCI ID is used by different products.
-So, several media drivers allow passing a ``card=`` parameter, in order
-to setup a card number that would match the correct settings for an
-specific board.
+At the above example, the first card uses the ``saa7134`` driver, and
+has a vendor/device PCI ID equal to ``1131:7133`` and a PCI subsystem
+ID equal to ``1461:f01d``.
+
+Unfortunately, sometimes the same PCI subsystem ID is used by different
+products. So, several media drivers allow passing a ``card=`` parameter,
+in order to setup a card number that would match the correct settings for
+an specific board.
 
 The current supported PCI/PCIe cards (not including staging drivers) are
 listed below\ [#]_.

Documentation/admin-guide/media/cx23885-cardlist.rst

@@ -12,7 +12,7 @@ cx23885 cards list
 
    * - Card number
      - Card name
-     - PCI IDs
+     - PCI subsystem IDs
 
    * - 0
      - UNKNOWN/GENERIC

Documentation/admin-guide/media/cx88-cardlist.rst

@@ -12,7 +12,7 @@ CX88 cards list
 
    * - Card number
      - Card name
-     - PCI IDs
+     - PCI subsystem IDs
 
    * - 0
      - UNKNOWN/GENERIC

Documentation/admin-guide/media/ivtv-cardlist.rst

@@ -12,7 +12,7 @@ IVTV cards list
 
    * - Card number
      - Card name
-     - PCI IDs
+     - PCI subsystem IDs
 
    * - 0
      - Hauppauge WinTV PVR-250

Documentation/admin-guide/media/saa7134-cardlist.rst

@@ -12,7 +12,7 @@ SAA7134 cards list
 
    * - Card number
      - Card name
-     - PCI IDs
+     - PCI subsystem IDs
 
    * - 0
      - UNKNOWN/GENERIC

Documentation/admin-guide/media/saa7164-cardlist.rst

@@ -12,7 +12,7 @@ SAA7164 cards list
 
    * - Card number
      - Card name
-     - PCI IDs
+     - PCI subsystem IDs
 
    * - 0
      - Unknown