ARM: dts: msm: Reduce max frequency for bin0 in FSM9900

Reduce the maximum frequency to 1.5G for FSM9900 pvs-bin0
parts for reliable operation.

Change-Id: I2b79c3e02f692ba3911adb45bf5b3735a582e94c
Acked-by: Kaushik Sikdar <ksikdar@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>