danipc

Change MTU and descriptor size from 128 to 1600 bytes to move
data more efficiently between Krait and Hex2 processors. Get the
fifo size from dt.

Change-Id: Id75f058c54b334389323dbfe199c2f406d57c282
Acked-by: Xiuping Lu <xiupingl@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>