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/include/osmocom/msc/sdp_msg.h b/include/osmocom/msc/sdp_msg.h
index 724440c..e3879f6 100644
--- a/include/osmocom/msc/sdp_msg.h
+++ b/include/osmocom/msc/sdp_msg.h
@@ -41,8 +41,8 @@
 	struct csd_bs_list bearer_services;
 };
 
-#define foreach_sdp_audio_codec(/* struct sdp_audio_codec* */ CODEC, \
-				/* struct sdp_audio_codecs* */ AC) \
+#define sdp_audio_codecs_foreach(/* struct sdp_audio_codec* */ CODEC, \
+				 /* struct sdp_audio_codecs* */ AC) \
 	for (CODEC = (AC)->codec; \
 	     (CODEC - (AC)->codec) < OSMO_MIN((AC)->count, ARRAY_SIZE((AC)->codec)); \
 	     CODEC++)