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>

drivers/usb/gadget/net2280.h

@@ -44,6 +44,10 @@ set_idx_reg(struct net2280_regs __iomem *regs, u32 index, u32 value)
 
 #define PCI_VENDOR_ID_PLX_LEGACY 0x17cc
 
+#define PLX_LEGACY		BIT(0)
+#define PLX_2280		BIT(1)
+#define PLX_SUPERSPEED		BIT(2)
+
 #define REG_DIAG		0x0
 #define     RETRY_COUNTER                                       16
 #define     FORCE_PCI_SERR                                      11
@@ -166,6 +170,8 @@ struct net2280 {
 	u16				chiprev;
 	int enhanced_mode;
 	int n_ep;
+	kernel_ulong_t			quirks;
+
 
 	/* pci state used to access those endpoints */
 	struct pci_dev			*pdev;