ARM: dts: msm: Enable KPDPWR software debounce for PM8998 PON on SDM845

Enable the SW debounce handling for KPDPWR_N rising edge so that
spurious interrupts won't generate false input events.

Change-Id: Ib5c4507046e4e41d38a004bca224f102ff31f5fd
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>