sh: Switch to new style CMT device

sh: Switch to new style CMT device

The CMT (Compare Match Timer) driver implements a new style of platform
data that handles the timer as a single device with multiple channel.
Switch from the old-style platform data to the new-style platform data.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
(cherry picked from commit 9b17e48cd4df4e129976c37660cf9ec644c66059)
Signed-off-by: Simon Horman <horms@verge.net.au>