add DRANAP debug constant

Change-Id: I6132198ea86979e0ed84df32f2b7117feba497f2
diff --git a/openbsc/src/gprs/sgsn_main.c b/openbsc/src/gprs/sgsn_main.c
index cb762b7..aef36ca 100644
--- a/openbsc/src/gprs/sgsn_main.c
+++ b/openbsc/src/gprs/sgsn_main.c
@@ -281,6 +281,11 @@
 		.description = "GPRS Sub-Network Dependent Control Protocol (SNDCP)",
 		.enabled = 1, .loglevel = LOGL_DEBUG,
 	},
+	[DRANAP] = {
+		.name = "DRANAP",
+		.description = "RAN Application Part (RANAP)",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
 };
 
 static const struct log_info gprs_log_info = {