usb: dwc3: Fix dwc3 device name for MSM platfrom

Since the change "usb: dwc3: fetch mode of operation from HW"
the dwc3/core.c driver is not using id_table anymore in order
to specify which devices this driver support.

Therefore, for the device<->driver attachment to succeed
on MSM platform we need to allocate a device with the same
driver name as of dwc3/core.c

Change-Id: Ic709a6c33dd482b7c085ebf4b60914558d32271b
Signed-off-by: Ido Shayevitz <idos@codeaurora.org>