usb: gadget: Add support for fifo resize of user specified IN endpoint

Add support for high bandwidth transfer on Isochronous IN
endpoint by allowing fifo_resize on a particular endpoint using
high_bw_ep_in_num module parameter.
To enable fifo resize so as to support high bandwidth transfers
on Isoc IN endpoint:
1. echo 0 > /sys/class/android_usb/android0/enable
2. echo <ep_num> > /sys/module/dwc3/parameters/high_bw_ep_in_num
3. echo 1 > /sys/class/android_usb/android0/enable

CRs-fixed: 2043149
Change-Id: I2bae02cb5e33ccd15622acf4a4e160452b670d96
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>