drm/amdgpu: enable UMSCH scheduling for VPE

Add VPE into UMSCH hw resourses,
set vmid mask to 0xf00,
set hqd mask to 0xfe,
then UMSCH can schedule VPE queues.

Signed-off-by: Lang Yu <Lang.Yu@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Veerabadhran Gopalakrishnan <Veerabadhran.Gopalakrishnan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>