ARM: dts: msm: remove modem wdog for mdmcalifornium

Since modem watchdog interrupt will be handled by TZ for
mdmcalifornium, remove the interrupt from modem pil node so that APPS
doesn't try to register modem wdog.

CRs-Fixed: 1063612
Change-Id: Ib8237444251da879ac1fb4694a3abac69ebe3c4c
Signed-off-by: Puja Gupta <pujag@codeaurora.org>