usb: gadget: net2280: Use quirks instead of pci id

Use of quirks improve readability and will be easier to add new devices
to this driver.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>