feat(rcar3): add cache operations to boot process

Add cache operations because BL2 disabled MMU at the end of the boot
process, but did not clean/invalidate for the cache used by MMU.

Signed-off-by: Toshiyuki Ogasahara <toshiyuki.ogasahara.bo@hitachi.com>
Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
Change-Id: Id4070b46103ca2b50788b3a99f6961a35df24418
1 file changed