accel/amdxdna: Add MODULE_FIRMWARE() declarations

Initramfs building tools such as dracut will look for a MODULE_FIRMWARE()
declaration to determine which firmware to include in the initramfs
when a driver is included in the initramfs.

As amdxdna doesn't declare any firmware this causes the driver to fail
to load with -ENOENT when in the initramfs.  Add the missing declaration
for possible firmware.

Reported-by: Renjith Pananchikkal <Renjith.Pananchikkal@amd.com>
Suggested-by: Alexander Deucher <Alexander.Deucher@amd.com>
Fixes: 8c9ff1b1 ("accel/amdxdna: Add a new driver for AMD AI Engine")
Reviewed-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://lore.kernel.org/r/20250204174031.3425762-1-superm1@kernel.org


Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250204174031.3425762-1-superm1@kernel.org