SMS: Add value_string for TS 04.11 CP and RP state

Change-Id: I1b2f6fc6f455b0ba2a5732c567a4867bca97c3b0
diff --git a/src/gsm/gsm0411_smr.c b/src/gsm/gsm0411_smr.c
index 892b7f0..21d28c5 100644
--- a/src/gsm/gsm0411_smr.c
+++ b/src/gsm/gsm0411_smr.c
@@ -492,4 +492,11 @@
 	return rc;
 }
 
+const struct value_string gsm411_rp_state_names[] = {
+	{ GSM411_RPS_IDLE,		"IDLE" },
+	{ GSM411_RPS_WAIT_FOR_RP_ACK,	"WAIT_FOR_RP_ACK" },
+	{ GSM411_RPS_WAIT_TO_TX_RP_ACK,	"WAIT_TO_TX_RP_ACK" },
+	{ GSM411_RPS_WAIT_FOR_RETRANS_T,"WAIT_FOR_RETRANS_T" },
+	{ 0, NULL }
+};
 /*! @} */