drivers/staging/rtl8821ae: 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8821ae/rtl8821ae/hw.c

@@ -1623,7 +1623,7 @@ static int _rtl8821ae_set_media_status(struct ieee80211_hw *hw,
 
 	rtl_write_byte(rtlpriv, (MSR), bt_msr);
 	rtlpriv->cfg->ops->led_control(hw, ledaction);
-	if ((bt_msr & ~0xfc) == 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/staging/rtl8821ae/rtl8821ae/reg.h

@@ -431,6 +431,7 @@
 #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