wl18xx: change the number of WLAN addrs per chip

Each 18xx chip contains only 2 real MAC addresses
usable for WLAN, forcing us to use the LAA bit
approach to obtain a third MAC address.
Signed-off-by: NArik Nemtsov <arik@wizery.com>
Signed-off-by: NEliad Peller <eliad@wizery.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ti/wl18xx/wl18xx.h

@@ -38,7 +38,7 @@
 #define WL18XX_NUM_TX_DESCRIPTORS 32
 #define WL18XX_NUM_RX_DESCRIPTORS 32
 
-#define WL18XX_NUM_MAC_ADDRESSES 3
+#define WL18XX_NUM_MAC_ADDRESSES 2
 
 #define WL18XX_RX_BA_MAX_SESSIONS 13