ARM: mach-shmobile: add TMU platform data for sh7372

This patch adds support for the two first channels of
the TMU0 timer block on sh7372. One channel is used
for clock event, the other for clock source.

Signed-off-by: Magnus Damm <damm@opensource.se>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>