drm/amdgpu: correct doorbell range/size value for CSDMA_DOORBELL_RANGE

current function mixes CSDMA_DOORBELL_RANGE and SDMA0_DOORBELL_RANGE
range/size manipulation, while these 2 registers have difference size
field mask. Remove range/size manipulation for SDMA0_DOORBELL_RANGE.
Signed-off-by: Yifan Zhang <yifan1.zhang@amd.com>
Reviewed-by: Xiaojian Du <Xiaojian.Du@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/nbio_v7_7.c

@@ -68,12 +68,6 @@ static void nbio_v7_7_sdma_doorbell_range(struct amdgpu_device *adev, int instan
 		doorbell_range = REG_SET_FIELD(doorbell_range,
 					       GDC0_BIF_CSDMA_DOORBELL_RANGE,
 					       SIZE, doorbell_size);
-		doorbell_range = REG_SET_FIELD(doorbell_range,
-					       GDC0_BIF_SDMA0_DOORBELL_RANGE,
-					       OFFSET, doorbell_index);
-		doorbell_range = REG_SET_FIELD(doorbell_range,
-					       GDC0_BIF_SDMA0_DOORBELL_RANGE,
-					       SIZE, doorbell_size);
 	} else {
 		doorbell_range = REG_SET_FIELD(doorbell_range,
 					       GDC0_BIF_SDMA0_DOORBELL_RANGE,