drm/amdgpu: drop flood print in rlcg reg access function

A lot of below message are outputed in SRIOV case.
amdgpu: indirect registers access through rlcg is not supported

Also drop redundant ret set, as it's initialized to be false already.

Fixes: 29dbcac8 ("drm/amdgpu: add helper to query rlcg reg access flag")
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -849,9 +849,6 @@ static bool amdgpu_virt_get_rlcg_reg_access_flag(struct amdgpu_device *adev,
 		}
 		break;
 	default:
-		dev_err(adev->dev,
-			"indirect registers access through rlcg is not supported\n");
-		ret = false;
 		break;
 	}
 	return ret;