ARM: shmobile: henninger: add MSIOF0 DT support

Define the Henninger board dependent part of the MSIOF0 device node.
Add device node for Renesas R2A11302FT PMIC for which no bindings exist yet.

Based on the Koelsch MSIOF device tree patch by Geert Uytterhoeven.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>