drm/radeon: add VCE version parsing and checking

Also make the result available to userspace.

Signed-off-by: Christian König <christian.koenig@amd.com>

diff --cc drivers/gpu/drm/radeon/radeon.h
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_kms.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_vce.c
Simple merge

diff --cc include/uapi/drm/radeon_drm.h
Simple merge