power: qpnp-fg: fix unbalanced irq enable warning for FULL_SOC irq

FULL_SOC irq is dynamically enabled or disabled by the driver and
a flag is used for that. Since the interrupt is enabled during
bootup and flag is not set, there is a warning printed out for
unbalanced irq enable. Also interrupt was not configured wakeup
capable. Fix it.

Change-Id: I4f3394aebca41c862746232ed560e0e13a508081
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>