power: qcom: smb2: set switcher-power-ok IRQ as wakeup IRQ

The switcher-power-ok interrupt is used in reverse boost detection
workaround. In order for it to work properly during sleep, declare
switcher-power-ok IRQ as wakeup IRQ.

CRs-Fixed: 2229671
Change-Id: I8e967be9b37b13e20b945298aba23f1c5f15815f
Signed-off-by: Harry Yang <harryy@codeaurora.org>