drm/amdgpu: add UMSCH 4.0 api definition

Add api definition for UMSCH 4.0.

v2: adjust coding style.

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>
This commit is contained in:
Lang Yu 2023-05-10 16:14:44 +08:00 • committed by Alex Deucher
commit 2da1b04a20