mach-shmobile: Emma Mobile EV2 SoC base support V3

This is V3 of the Emma Mobile EV2 SoC support.
Included here is support for serial and timer
devices which is just about enough to boot a kernel.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>