esoc: Fix irq unbalance wake disable warning

Power management irq wakeup mode is by default disabled.
Calling irq_set_irq_wake() on a disabled irq causes warning.
Remove irq_set_irq_wake() function from mdm_enable/disable_irqs
functions and set it once in probe.

Change-Id: Ib7f49ae101e6dc04790649d408c1722df8da8bd2
Signed-off-by: Arun KS <arunks@codeaurora.org>