drm/amd/pm: Keep interface version in PMFW header

Use the interface version directly from PMFW interface header file rather
than keeping another definition in common smu13 file.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>