usb: dwc3-msm: add support for ep specific-reset

Some dbm implementations require that after going
through a Low Power Mode (lpm) suspend flow - the
dbm ep be reset prior to resuming.
This patch implements and exposes this functionality.

Change-Id: I348a2c61ca159ef8b5a14fac3465d777bd4217b4
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>