wl18xx: derive the MAC address from the BD_ADDR in fuse ROM

Add the get_mac operation in order to fetch the BD_ADDR from fuse ROM,
so that we can derive the WLAN MAC addresses from it.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
diff --git a/drivers/net/wireless/ti/wl18xx/reg.h b/drivers/net/wireless/ti/wl18xx/reg.h
index aaedf91..43863d3 100644
--- a/drivers/net/wireless/ti/wl18xx/reg.h
+++ b/drivers/net/wireless/ti/wl18xx/reg.h
@@ -132,6 +132,9 @@
 #define WL18XX_PG_VER_MASK		0x70
 #define WL18XX_PG_VER_OFFSET		4
 
+#define WL18XX_REG_FUSE_BD_ADDR_1	0xA02602
+#define WL18XX_REG_FUSE_BD_ADDR_2	0xA02606
+
 #define WL18XX_CMD_MBOX_ADDRESS		0xB007B4
 
 #define WL18XX_FW_STATUS_ADDR		0x50F8