net: sh-eth: Add invalidate cache control for rmobile (ARM SoC)

The sh-eth of rmobile needs to use invalidate_cache* function.
This patch adds invalidate_cache* function.

Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Patch: 268948
1 file changed