a_iface_bssap: compiler warning: cast const away from TLV val for l2h

Change-Id: Id91a4299391ff0d0e4e28ed05c2f755b9702146a
diff --git a/src/libmsc/a_iface_bssap.c b/src/libmsc/a_iface_bssap.c
index 922dca9..8a1e39b 100644
--- a/src/libmsc/a_iface_bssap.c
+++ b/src/libmsc/a_iface_bssap.c
@@ -325,7 +325,7 @@
 
 	/* Parse Layer 3 Information element */
 	/* FIXME: This is probably to hackish, compiler also complains "assignment discards ‘const’ qualifier..." */
-	msg->l3h = TLVP_VAL(&tp, GSM0808_IE_LAYER_3_INFORMATION);
+	msg->l3h = (uint8_t*)TLVP_VAL(&tp, GSM0808_IE_LAYER_3_INFORMATION);
 	msg->tail = msg->l3h + TLVP_LEN(&tp, GSM0808_IE_LAYER_3_INFORMATION);
 
 	/* Create new subscriber context */
@@ -421,7 +421,7 @@
 	}
 
 	if (TLVP_PRESENT(&tp, GSM0808_IE_LAYER_3_MESSAGE_CONTENTS)) {
-		msg->l3h = TLVP_VAL(&tp, GSM0808_IE_LAYER_3_MESSAGE_CONTENTS);
+		msg->l3h = (uint8_t*)TLVP_VAL(&tp, GSM0808_IE_LAYER_3_MESSAGE_CONTENTS);
 		msg->tail = msg->l3h + TLVP_LEN(&tp, GSM0808_IE_LAYER_3_MESSAGE_CONTENTS);
 	} else {
 		msgb_free(msg);