power: qpnp-smb5: Update the interrupt handler names

It is observed that interrupt handlers with same names across drivers
are being incorrectly mapped. Until this is fixed and to align the names
with the driver name, update the interrupt handler names.

Change-Id: Ib2aea77c0b0e53ff99c34fafc531a5291f70449c
Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>