usb: gadget: pch_udc: Use PCI sub IDs instead of DMI

We don't need DMI to identify Intel Minnowboard (v1) since it has
properly set PCI sub IDs. So, drop unneeded DMI level of identification.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210325135508.70350-3-andriy.shevchenko@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>