usb: dwc3-msm: Remove configuration of DBM event buffer from block reset

Since DBM event buffer is configured during ep queue, it
is no longer required to configure DBM event buffer during
block reset.

Change-Id: I6bbf18a8796838a6c44183a0247f40508288a5f1
Signed-off-by: Bar Weiner <bweiner@codeaurora.org>