Documentation/ABI: Update IFS ABI doc

Array BIST test doesn't need an IFS test image to operate unlike
the SCAN test. Consequently current_batch and image_version
files are not applicable for Array BIST IFS device instance,
clarify this in the ABI doc.

Also given that multiple tests are supported, take the opportunity
to generalize descriptions wherever applicable.

Signed-off-by: Jithu Joseph <[e-mail]>
Reviewed-by: Tony Luck <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Hans de Goede <[e-mail]>
Signed-off-by: Hans de Goede <[e-mail]>

Documentation/ABI/testing/sysfs-platform-intel-ifs

···
+Device instance to test mapping
+intel_ifs_0  ->  Scan Test
+intel_ifs_1  ->  Array BIST test
+
 What:		/sys/devices/virtual/misc/intel_ifs_<N>/run_test
 Date:		Nov 16 2022
 KernelVersion:	6.2
···
 		completes the test for the core containing that thread.
 		Example: to test the core containing cpu5: echo 5 >
 		/sys/devices/virtual/misc/intel_ifs_<N>/run_test
+Devices:	all
 
 What:		/sys/devices/virtual/misc/intel_ifs_<N>/status
 Date:		Nov 16 2022
···
 Contact:	"Jithu Joseph" <[e-mail]>
 Description:	The status of the last test. It can be one of "pass", "fail"
 		or "untested".
+Devices:	all
 
 What:		/sys/devices/virtual/misc/intel_ifs_<N>/details
 Date:		Nov 16 2022
 KernelVersion:	6.2
 Contact:	"Jithu Joseph" <[e-mail]>
 Description:	Additional information regarding the last test. The details file reports
-		the hex value of the SCAN_STATUS MSR. Note that the error_code field
+		the hex value of the STATUS MSR for this test. Note that the error_code field
 		may contain driver defined software code not defined in the Intel SDM.
+Devices:	all
 
 What:		/sys/devices/virtual/misc/intel_ifs_<N>/image_version
 Date:		Nov 16 2022
 KernelVersion:	6.2
 Contact:	"Jithu Joseph" <[e-mail]>
-Description:	Version (hexadecimal) of loaded IFS binary image. If no scan image
-		is loaded reports "none".
+Description:	Version (hexadecimal) of loaded IFS test image. If no test image
+		is loaded reports "none". Only present for device instances where a test image
+		is applicable.
+Devices:	intel_ifs_0
 
 What:		/sys/devices/virtual/misc/intel_ifs_<N>/current_batch
 Date:		Nov 16 2022
···
 		The number written treated as the 2 digit suffix in the following file name:
 		/lib/firmware/intel/ifs_<N>/ff-mm-ss-02x.scan
 		Reading the file will provide the suffix of the currently loaded IFS test image.
+		This file is present only for device instances where a test image is applicable.
+Devices:	intel_ifs_0