arm/dt: msm9625: Tune fifo sizes for BAM pipes

In msm9625, WLAN connectivity is passed through BAM pipes between
the IPA and the HSIC. This change tunes the fifo sizes of the BAM
pipes in order to fix out of memory issue and to increase
throughput.

By reducing the Rx pipe data fifo size, host worker queue gets
enough time to process the data before it receives the next skb.
Moreover the skb is not getting queued for longer time for
processing. Similarly the Desc FIFO size for the TX BAM pipe has
been increased to get better downlink TCP throughput.

Change-Id: I4f22a728679375381bd573a38ef98221474c0458
Signed-off-by: Prashanth Bhatta <bhattap@codeaurora.org>