V4L/DVB (9182): S2API: Added support for DTV_HIERARCHY

A user tuning DVB-T via the S2API reports that this was not implemented,
and his tuning was failing.

Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/linux/dvb/frontend.h b/include/linux/dvb/frontend.h
index 5578fba..e185627 100644
--- a/include/linux/dvb/frontend.h
+++ b/include/linux/dvb/frontend.h
@@ -273,8 +273,9 @@
 #define DTV_CODE_RATE_LP			37
 #define DTV_GUARD_INTERVAL			38
 #define DTV_TRANSMISSION_MODE			39
+#define DTV_HIERARCHY				40
 
-#define DTV_MAX_COMMAND				DTV_TRANSMISSION_MODE
+#define DTV_MAX_COMMAND				DTV_HIERARCHY
 
 typedef enum fe_pilot {
 	PILOT_ON,