Revert "usb: dwc3: Add support of disable L1 in HS mode"

This reverts commit c3de8d21 ("usb: dwc3: Add support
of disable L1 in HS mode") since the patch had implemented
the functionality by changing the bcdUSB to 2.0.
Eventhough it solves the problem, this results in compliance
failures.
Fix this by reverting the implementation. This will allow
the compliance to detect the DUT as L1 supported device.

Change-Id: I30894618584ebedf697dd98e0c94a42c961bc49d
Signed-off-by: Udipto Goswami <ugoswami@codeaurora.org>