cosmetic: fix typo

Change-Id: I36ed82dcb6010b331fe247a60f373d8e2e8a4bfc
Related: OS#2823
diff --git a/include/osmocom/bsc/gsm_data.h b/include/osmocom/bsc/gsm_data.h
index 82a5a51..fa65ab9 100644
--- a/include/osmocom/bsc/gsm_data.h
+++ b/include/osmocom/bsc/gsm_data.h
@@ -184,7 +184,7 @@
 		/* Channel rate flag, FR=1, HR=0, Invalid=-1 */
 		int full_rate;
 
-		/* Channel mode flage (signaling or voice channel) */
+		/* Channel mode flag (signaling or voice channel) */
 		enum gsm48_chan_mode chan_mode;
 
 	} user_plane;