drm/amdgpu: update more sdma instances irq support

Update for sdma ras ecc_irq and other minors.

Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>