usb: dwc2: pci: Correctly compile dwc2-pci as a module or built-in
usb: dwc2: pci: Correctly compile dwc2-pci as a module or built-in

The dwc2-pci driver should be compiled as a module when configured to
do so. If the dwc2-pci is configured as a module but actually
built-in, it can cause build errors due to the fact that the
generic-phy will be allowed to compile as a module causing undefined
references.

Reported-by: Alan Cox <91e38e63b890fbb214c8914809fde03c73e7f24d@lxorguk.ukuu.org.uk>
Signed-off-by: John Youn <d42a4eb72e2ed398cd02c138cc1131a66e2fa0de@synopsys.com>
Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs