IO events can also come from GPIO modules, which reside in the PER domain.
It is possible for the PER to enter RET while CORE is still in ON.
If GPIO 2-6 are enabled for IO-pad wakeups, the PER domain will not
wakeup in this case, unless we enable it.
Signed-off-by: NMike Chan <mike@android.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>