doc: Fix the Doxygen section endings

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/include/osmocom/gsm/tlv.h b/include/osmocom/gsm/tlv.h
index d2936d6..d1efc55 100644
--- a/include/osmocom/gsm/tlv.h
+++ b/include/osmocom/gsm/tlv.h
@@ -314,6 +314,6 @@
 #define TLVP_LEN(x, y)		(x)->lv[y].len
 #define TLVP_VAL(x, y)		(x)->lv[y].val
 
-/*! }@ */
+/*! @} */
 
 #endif /* _TLV_H */