msm: ssr: Correct storing the wdog_irq resource start address

Currently, even if platform_get_irq fails, the error value is being
stored in the wdog_bite_irq variable instead of it remaining as
zero.
Correct the behavior to store proper IRQ values.

Change-Id: I3f522ce865dbe88c47d3af168a805ce763be1f7e
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>