USB: dwc3: Add support for ISOC high bandwidth transfer in HS mode

Program ISOC TRB so that DWC3 can initiate more than one data
transfer in a micro frame.

Change-Id: I9465faf7f0e88c05bfb2c013772d2ea3b43c93d7
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>