wl18xx: support PG2 version of the chip

PG2 has a unique chip id. It supports similar HW quirks.

Signed-off-by: Ido Reis <idor@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
diff --git a/drivers/net/wireless/ti/wl18xx/reg.h b/drivers/net/wireless/ti/wl18xx/reg.h
index 43863d3..e81f609 100644
--- a/drivers/net/wireless/ti/wl18xx/reg.h
+++ b/drivers/net/wireless/ti/wl18xx/reg.h
@@ -140,6 +140,7 @@
 #define WL18XX_FW_STATUS_ADDR		0x50F8
 
 #define CHIP_ID_185x_PG10              (0x06030101)
+#define CHIP_ID_185x_PG20              (0x06030111)
 
 /*
  * Host Command Interrupt. Setting this bit masks