ARM: dts: msm: Change temp alarm IRQ type to IRQ_TYPE_EDGE_BOTH

The interrupt signal output by GEN2 TEMP_ALARM peripherals
differs from that of early versions.  Instead of outputting a
short pulse on each over-temperature stage transition, it outputs
low for stage 0 and high for stage > 0.  This means that
interrupt triggering needs to be configured for the falling edge
to receive a notification of the stage 1 to 0 transition.

Set IRQ type to IRQ_TYPE_EDGE_BOTH so that it triggers on both
rising and falling edges.

Change-Id: I395685f106158e1f9d300afdfd895236dd063447