drm/amdgpu: Add UVD_VCPU_INT_EN2 to dpg sram

Add RAS sepcifc programming to dpg sram.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>