drm/amdgpu: add generic func to check if ta fw is applicable

Separated xgmi ta is required for specific APU, and driver needs
parse the ta binary properly with aux xgmi ta packed.

v2: make the check function more generic (Lijo)

Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>