gsm_04_08: add more enum gsm48_chan_mode data values

From 3GPP TS 44.018 (version 15.4.0), table 10.5.2.6.1.

Change-Id: Ia6b428e5b6aaecf151cbfa980b89eff6d0fe6006
Related: OS#1572
diff --git a/src/gsm/gsm48.c b/src/gsm/gsm48.c
index 59393d1..dee6813 100644
--- a/src/gsm/gsm48.c
+++ b/src/gsm/gsm48.c
@@ -452,6 +452,16 @@
 	{ GSM48_CMODE_SPEECH_V5,	"SPEECH_V5" },
 	{ GSM48_CMODE_SPEECH_V6,	"SPEECH_V6" },
 
+	{ GSM48_CMODE_DATA_43k5_14k5,	"DATA_43k5_14k5" },
+	{ GSM48_CMODE_DATA_29k0_14k5,	"DATA_29k0_14k5" },
+	{ GSM48_CMODE_DATA_43k5_29k0,	"DATA_43k5_29k0" },
+	{ GSM48_CMODE_DATA_14k5_43k5,	"DATA_14k5_43k5" },
+	{ GSM48_CMODE_DATA_14k5_29k0,	"DATA_14k5_29k0" },
+	{ GSM48_CMODE_DATA_29k0_43k5,	"DATA_29k0_43k5" },
+
+	{ GSM48_CMODE_DATA_43k5,	"DATA_43k5" },
+	{ GSM48_CMODE_DATA_32k0,	"DATA_32k0" },
+	{ GSM48_CMODE_DATA_29k0,	"DATA_29k0" },
 	{ GSM48_CMODE_DATA_14k5,	"DATA_14k5" },
 	{ GSM48_CMODE_DATA_12k0,	"DATA_12k0" },
 	{ GSM48_CMODE_DATA_6k0,		"DATA_6k0" },