media: si2168: fix a comment about firmware version

There's a comment there at s82168 that it is wrong.

With firmware 4.0.11, sleep/resume works well without
need of download it every time. But firmware 4.0.19
needs to be downloaded again after sleep.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/dvb-frontends/si2168.c

@@ -614,7 +614,7 @@ static int si2168_sleep(struct dvb_frontend *fe)
 	if (ret)
 		goto err;
 
-	/* Firmware B 4.0-11 or later loses warm state during sleep */
+	/* Firmware later than B 4.0-11 loses warm state during sleep */
 	if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0))
 		dev->warm = false;