Return the value radeon_drm_ioctl() directly instead of storing it in
another redundant variable.
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: Nye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>