usb: dwc3: msm: configure event buffers after power collapse

During USB core power collapse the core registers
return to their reset value. hence, all registers
must be re-configured.
Not configuring the event buffers properly can
cause the controller to endlessly produce false
events and interrupts.

CRs-Fixed: 677681
Change-Id: Ie3d54bf948327c23102d5ed918473b3f78dc6d17
Signed-off-by: Bar Weiner <bweiner@codeaurora.org>