msm: watchdog: always manage interrupt on core 0

Previously the interrupt could end up being enabled or disabled on
either core. Since we switched to the percpu irq framework, it is a
problem if we enable the irq on one core and disable it on the other.
So, guarantee that the irq is always setup and removed on core 0.

Change-Id: Ibebbc1787171893f2115e975d6e610f446602804
Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
1 file changed