Add helper wrapper for BSSAP TLV parsing

Change-Id: Ib228368901ce90a02a5664f2510593371c7d29cd
diff --git a/include/osmocom/gsm/gsm0808.h b/include/osmocom/gsm/gsm0808.h
index cdbb273..652aae9 100644
--- a/include/osmocom/gsm/gsm0808.h
+++ b/include/osmocom/gsm/gsm0808.h
@@ -173,6 +173,9 @@
 
 const struct tlv_definition *gsm0808_att_tlvdef(void);
 
+/*! Parse BSSAP TLV structure using \ref tlv_parse */
+#define osmo_bssap_tlv_parse(dec, buf, len) tlv_parse(dec, gsm0808_att_tlvdef(), buf, len, 0, 0)
+
 const char *gsm0808_bssmap_name(uint8_t msg_type);
 const char *gsm0808_bssap_name(uint8_t msg_type);
 const char *gsm0808_cause_name(uint8_t cause);