cosmetic: rename to sdp_audio_codecs_foreach()

Better match the pattern of sdp_audio_codecs_* instead of having
foreach_ in the front. Prepare for prepending osmo_ some day, because I
plan to move the SDP API to a separate library.

Change-Id: Ia96190e0bdb513886663be1c8c12be3b403b71c9
diff --git a/src/libmsc/rtp_stream.c b/src/libmsc/rtp_stream.c
index 1f885c5..eb9ba7e 100644
--- a/src/libmsc/rtp_stream.c
+++ b/src/libmsc/rtp_stream.c
@@ -322,7 +322,7 @@
 		 * reasons we still need to translate to a struct mgcp_conn_peer representation to send it. */
 		struct sdp_audio_codec *codec;
 		int i = 0;
-		foreach_sdp_audio_codec(codec, &rtps->codecs) {
+		sdp_audio_codecs_foreach(codec, &rtps->codecs) {
 			const struct codec_mapping *m = codec_mapping_by_subtype_name(codec->subtype_name);
 			if (!m) {
 				LOG_RTPS(rtps, LOGL_ERROR, "Cannot map codec '%s' to MGCP: codec is unknown\n",