ARM: mach-shmobile: bonito: add PMIC settings

bonito board needs some settings by pmic which use i2c access.
It is dependent on the device to be used.
This patch adds standard settings.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>