ABI: sysfs-firmware-efi-esrt: use wildcards on What definitions

An "N" upper letter is not a wildcard, nor can easily be identified
by script, specially since the USB sysfs define things like.
bNumInterfaces. Use, instead, <N>, in order to let script/get_abi.pl
to convert it into a Regex.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/44f63335333d019490297903609a8a1754a66183.1631782432.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/ABI/testing/sysfs-firmware-efi-esrt

@@ -24,14 +24,14 @@ Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	The version of the ESRT structure provided by the firmware.
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/
+What:		/sys/firmware/efi/esrt/entries/entry<N>/
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	Each ESRT entry is identified by a GUID, and each gets a
 		subdirectory under entries/ .
 		example: /sys/firmware/efi/esrt/entries/entry0/
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/fw_type
+What:		/sys/firmware/efi/esrt/entries/entry<N>/fw_type
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	What kind of firmware entry this is:
@@ -43,33 +43,33 @@ Description:	What kind of firmware entry this is:
 		3   UEFI Driver
 		==  ===============
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/fw_class
+What:		/sys/firmware/efi/esrt/entries/entry<N>/fw_class
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	This is the entry's guid, and will match the directory name.
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/fw_version
+What:		/sys/firmware/efi/esrt/entries/entry<N>/fw_version
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	The version of the firmware currently installed.  This is a
 		32-bit unsigned integer.
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/lowest_supported_fw_version
+What:		/sys/firmware/efi/esrt/entries/entry<N>/lowest_supported_fw_version
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	The lowest version of the firmware that can be installed.
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/capsule_flags
+What:		/sys/firmware/efi/esrt/entries/entry<N>/capsule_flags
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	Flags that must be passed to UpdateCapsule()
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/last_attempt_version
+What:		/sys/firmware/efi/esrt/entries/entry<N>/last_attempt_version
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	The last firmware version for which an update was attempted.
 
-What:		/sys/firmware/efi/esrt/entries/entry$N/last_attempt_status
+What:		/sys/firmware/efi/esrt/entries/entry<N>/last_attempt_status
 Date:		February 2015
 Contact:	Peter Jones <pjones@redhat.com>
 Description:	The result of the last firmware update attempt for the