Add PM helpers to STMPE and add support to enable wakeup from low power
states
Acked-by: NRabin VINCENT <rabin.vincent@stericsson.com>
Acked-by: NLinus WALLEIJ <linus.walleij@stericsson.com>
Signed-off-by: NSundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>