IuPS: add GMM Service Request related constants and value_str

Change-Id: Ie023fc78099932f95cc8f1b3a04fe25dfd14bc35
diff --git a/src/gsm/gsm_04_08_gprs.c b/src/gsm/gsm_04_08_gprs.c
index 7cfcc80..14207f8 100644
--- a/src/gsm/gsm_04_08_gprs.c
+++ b/src/gsm/gsm_04_08_gprs.c
@@ -199,3 +199,14 @@
 };
 
 const struct value_string *gprs_det_t_mt_strs = gprs_det_t_mt_strs_;
+
+const struct value_string gprs_service_t_strs_[] = {
+	{ GPRS_SERVICE_T_SIGNALLING,	"signalling" },
+	{ GPRS_SERVICE_T_DATA,		"data" },
+	{ GPRS_SERVICE_T_PAGING_RESP,	"paging response" },
+	{ GPRS_SERVICE_T_MBMS_MC_SERV,	"MBMS multicast service" },
+	{ GPRS_SERVICE_T_MBMS_BC_SERV,	"MBMS broadcast service" },
+	{ 0, NULL }
+};
+
+const struct value_string *gprs_service_t_strs = gprs_service_t_strs_;
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index f530b6f..dc8559f 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -56,6 +56,7 @@
 gprs_upd_t_strs;
 gprs_det_t_mo_strs;
 gprs_det_t_mt_strs;
+gprs_service_t_strs;
 
 gsm0341_build_msg;