ARM: dts: msm: modify delta SOC irq configuration for pmi8998 and pm660

Delta MSOC and BSOC interrupts need to be configured only for
the rising edge as that is sufficient to handle most of the
actions to be done responding to them. Update the interrupt
configurations for pmi8998 and pm660.

Change-Id: I84d6d009c3b5227869309570d94c62bde6bea710
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>