Add support for a new version of the IIC block
found in the SH-Mobile ARM line of processors.

Prototype patch written by Nishimoto-san.
Tested on sh7377 and sh7372.
Signed-off-by: NISHIMOTO Hiroki <nishimoto.hiroki@renesas.com>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>