drm/amdgpu: add support for SDMA IP version 6.1.4
This initializes SDMA IP version 6.1.4.
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Tim Huang <tim.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
authored by