Revert "usb: dwc3: drop FIFO resizing logic"

This reverts commit bc508161 ("usb: dwc3: drop FIFO resizing
logic") to bring back resizing of TXFIFO functionality with USB IN
endpoints. This helps to improve througput based on fine tuning
available RAM size with USB controller on different platforms.

Change-Id: I81064459f208ca59514ae1642c14bf617ac028fa
Signed-off-by: Mayank Rana <mrana@codeaurora.org>