ARM: dts: msm: update fastrpc PM QoS request latency for 8150

Update fastrpc PM QoS request latency from 611 us to 235 us as the
low power mode latency numbers are updated for 8150.

Change-Id: I2a99d8678181a9d884652691a2e3eeced48fff3b
Acked-by: Viswanatham Paduchuri <vpaduchu@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>