ARM: dts: msm: Add android_usb QOS latencies on MSM8996

Add the pm-qos-latency property for android_usb. This specifies
the tolerable latencies to allow for CPU low power modes.
The values used correspond to:
<Max (all_cpu_fpc) +1, Max(all_cluster_gdhsc) +1,
Max(all_cluster_fpc) +1 )>.
This voting is required to improve MTP read throughput from 67 MBps
to 95 MBps.

Change-Id: Ia1722ee734b84c0be442c32a70bb0313902f4003
Signed-off-by: Mayank Rana <mrana@codeaurora.org>