This MAC has no internal phy for rv1108 and the whole clock
infrastructure hasn't been used yet, so is safe to fix.
Signed-off-by: NElaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: NDavid Wu <david.wu@rock-chips.com>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>