gsm_08_08.h: fix typo in GSM0808_DATA_FULL_PREF

Change-Id: I25f46bf3893bb68203414300587756cf2fdb04f7
diff --git a/include/osmocom/gsm/protocol/gsm_08_08.h b/include/osmocom/gsm/protocol/gsm_08_08.h
index c7cf1d8..96ac6af 100644
--- a/include/osmocom/gsm/protocol/gsm_08_08.h
+++ b/include/osmocom/gsm/protocol/gsm_08_08.h
@@ -446,10 +446,11 @@
 };
 
 /* GSM 08.08 3.2.2.11 Channel Type */
+#define GSM0808_DATA_FULL_RPREF GSM0808_DATA_FULL_PREF
 enum gsm0808_chan_rate_type_data {
 	GSM0808_DATA_FULL_BM	= 0x8,
 	GSM0808_DATA_HALF_LM	= 0x9,
-	GSM0808_DATA_FULL_RPREF	= 0xa,
+	GSM0808_DATA_FULL_PREF	= 0xa,
 	GSM0808_DATA_HALF_PREF	= 0xb,
 	GSM0808_DATA_FULL_PREF_NO_CHANGE	= 0x1a,
 	GSM0808_DATA_HALF_PREF_NO_CHANGE	= 0x1b,