OMAP3: PM: Check in set_pwrdm_state that target state is supported by pwrdm v2

OMAP3: PM: Check in set_pwrdm_state that target state is supported by pwrdm v2

Check that wanted sleep state is supported by powerdomain. If it is
not supported, then use next lowest supported state.

Check also on suspend that state of pwrdm was lower or equal.

Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>