msm: power-on: Configure the PON IRQs to support wakeup

Mark the IRQs as wake capable if they are configured
to report linux-key.

Special handling is required for the RESIN interrupt
due to a hardware bug (failure of state detection by
the RESIN IRQ).

Change-Id: I0408b98f1f3a77f77bee7dc593e5de6b5eca8ce1
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>