accel/amdxdna: Get device revision to derive VBNV string

accel/amdxdna: Get device revision to derive VBNV string

Add support for querying the device revision from firmware.

Use the returned revision to look up the VBNV string during device
initialization, and fall back to the default VBNV when the revision
query is not supported or no mapping is found.

This allows the driver to report the accurate VBNV for devices that
share the same vendor/device ID but differ by hardware revision.

Signed-off-by: Max Zhen <max.zhen@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
[Lizhi: Revise amdxdna_vbnv_init()]
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260416190150.1040067-1-lizhi.hou@amd.com