staging: r8188eu: drop redundant if check in IS_MCAST

The if check is redundant. Drop it and simplify the funciton.
Signed-off-by: Vihas Makwana <makvihas@gmail.com>
Link: https://lore.kernel.org/r/20220405124239.3372-2-makvihas@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/wifi.h

@@ -240,10 +240,7 @@ enum WIFI_REG_DOMAIN {
 
 static inline bool IS_MCAST(unsigned char *da)
 {
-	if ((*da) & 0x01)
-		return true;
-	else
-		return false;
+	return (*da) & 0x01;
 }
 
 static inline unsigned char *get_da(unsigned char *pframe)