ARM: dts: msm: Enable reset via PM_RESIN_N for mdm9650 CV2X

Enable PMIC stage 2 reset for mdm9650 CV2X when the
reset line is held low for 2 seconds. This is used by the
PCIe RC host to force reset the MDM if it crashes or becomes
unresponsive.

Change-Id: Ie99cb0842b895bf474dd7dab8f78811834820ee0
Signed-off-by: Gustavo Solaira <gustavos@codeaurora.org>