net: usbnet: Increase USB RX/TX qlen and IPA descriptor counts

Increase USB RX/TX qlens to improve TCP DL tput. In the case of
HSUSB the default qlen of 60 is inadequate as it results in
packet drops when IPA sends data at a high rate. This results
in TCP window collapse and poor tput. Also increase IPA UL
descriptor counts for better UL performance. This will help
improve TCP ACK performance for the DL case.

CRs-Fixed: 886212
Signed-off-by: Devdutt Patnaik <dpatnaik@codeaurora.org>
Change-Id: Iab583857a9e578bceed528a0348235abf367c78c