[media] em28xx: add support for EM28174 chip

EM28174 is very similar as already supported EM2874.
I am not sure what are differences, but it could be analog support.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/video/em28xx/em28xx-reg.h b/drivers/media/video/em28xx/em28xx-reg.h
index 91e9055..e92a28e 100644
--- a/drivers/media/video/em28xx/em28xx-reg.h
+++ b/drivers/media/video/em28xx/em28xx-reg.h
@@ -201,6 +201,7 @@
 	CHIP_ID_EM2870 = 35,
 	CHIP_ID_EM2883 = 36,
 	CHIP_ID_EM2874 = 65,
+	CHIP_ID_EM28174 = 113,
 };
 
 /*