power: bcl_peripheral: Update enable/disable interrupt logic

Add linux interrupt framework irq enable/disable.
This was required since vbat interrupt was still
firing even after disabling irq registers through
SPMI interface. And also BCL driver should not alter
BCL_INT_EN bit that will have bad behaviour.

Change-Id: I0dd23fc6eb240809890bccb1bbcae3eacddf5685
Signed-off-by: Shiju Mathew <shijum@codeaurora.org>