drivers/net: return operator cleanup

Change "return (EXPR);" to "return EXPR;"

return is not a function, parentheses are not required.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hamradio/hdlcdrv.c

@@ -110,7 +110,7 @@ static int calc_crc_ccitt(const unsigned char *buf, int cnt)
 	for (; cnt > 0; cnt--)
 		crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buf++) & 0xff];
 	crc ^= 0xffff;
-	return (crc & 0xffff);
+	return crc & 0xffff;
 }
 #endif