SH: cpuidle: initialize the driver's states directly
Like all the other drivers, let's initialize the structure a compile time
instead of init time.
The states #1 and #2 are not enabled by default. The init function will
check the features of the board in order to enable the state.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>