drm/xe: Remove unused revid from firmware name

drm/xe: Remove unused revid from firmware name

The rev field is always 0 so it ends up never used. In i915 it was
introduced because of CML: up to rev 5 it reuses the guc and huc
firmware blobs from KBL. After that there is a specific firmware for
that platform.  This can be reintroduced later if ever needed.

With the removal of revid the packed attribute in
uc_fw_platform_requirement, which is there only for reducing the space
these tables take, can also be removed since it has even more limited
usefulness: currently there's only padding of 2 bytes. Remove the
attribute to avoid the unaligned access.

	$ pahole -C uc_fw_platform_requirement build64/drivers/gpu/drm/xe/xe_uc_fw.o
	struct uc_fw_platform_requirement {
		enum xe_platform           p;                    /*     0     4 */
		const struct uc_fw_blob    blob;                 /*     4    10 */

		/* size: 16, cachelines: 1, members: 2 */
		/* padding: 2 */
		/* last cacheline: 16 bytes */
	};

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://lore.kernel.org/r/20230324051754.1346390-2-lucas.demarchi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>