V4L/DVB (5479): Use ARRAY_SIZE instead of a magic number

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/em28xx/em28xx-i2c.c b/drivers/media/video/em28xx/em28xx-i2c.c
index d829d8f..563a831 100644
--- a/drivers/media/video/em28xx/em28xx-i2c.c
+++ b/drivers/media/video/em28xx/em28xx-i2c.c
@@ -523,7 +523,7 @@
 	unsigned char buf;
 	int i, rc;
 
-	for (i = 0; i < 128; i++) {
+	for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
 		c->addr = i;
 		rc = i2c_master_recv(c, &buf, 0);
 		if (rc < 0)