media: replace bellow -> below

Bellow is yelling. Ok, sometimes the code is yells a lot, but
but this is not the case there ;)

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/tuners/tuner-xc2028.c

@@ -1094,7 +1094,7 @@ static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
 		 * Still need tests for XC3028L (firmware 3.2 or upper)
 		 * So, for now, let's just comment the per-firmware
 		 * version of this change. Reports with xc3028l working
-		 * with and without the lines bellow are welcome
+		 * with and without the lines below are welcome
 		 */
 
 		if (priv->firm_version < 0x0302) {