rtlwifi/rtl8723ae: Replace magic number by macro

For consistency with other drivers, replace a magic number by a macro.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/rtl8723ae/hw.c

@@ -1109,7 +1109,7 @@ static int _rtl8723ae_set_media_status(struct ieee80211_hw *hw,
 
 	rtl_write_byte(rtlpriv, (MSR), bt_msr);
 	rtlpriv->cfg->ops->led_control(hw, ledaction);
-	if ((bt_msr & 0x03) == MSR_AP)
+	if ((bt_msr & MSR_MASK) == MSR_AP)
 		rtl_write_byte(rtlpriv, REG_BCNTCFG + 1, 0x00);
 	else
 		rtl_write_byte(rtlpriv, REG_BCNTCFG + 1, 0x66);

drivers/net/wireless/rtlwifi/rtl8723ae/reg.h

@@ -361,6 +361,7 @@
 #define	MSR_ADHOC				0x01
 #define	MSR_INFRA				0x02
 #define	MSR_AP					0x03
+#define	MSR_MASK				0x03
 
 #define	RRSR_RSC_OFFSET				21
 #define	RRSR_SHORT_OFFSET			23