msm: watchdog: Add hibernation support

Currently watchdog code is registering to suspend and resume
callbacks only. During hibernation lifecycle freeze, thaw and
restore callbacks are called(dev_pm_ops).Hook up hibernation
ops using macro SET_NOIRQ_SYSTEM_SLEEP_PM_OPS.

Change-Id: I439d29d1cdcd85a4ab0841252bac888fb17498fc
Signed-off-by: Omkar Savagaonkar <omkars@codeaurora.org>