ARM: dts: msm: Update thermal sensor info for mdmcalifornium

Update sensor info node to use tsens_tz_sensor4 instead
of tsens_tz_sensor6 for modem on-die temperature sensor.

Change-Id: I9d0424513b79e5d5f96f4ce968c9050959f869ab
Acked-by: Chris Medrano <cmedrano@qti.qualcomm.com>
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>