ARM: rmobile: Implement PMIC reset on V2H Blanche

Add code to reset the board through PMIC, by writing the required
PMIC registers in the CPU reset handler.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
1 file changed