cosmetic: rename osmo_msc_data.h to bsc_msc_data.h

With the OsmoMSC program coming up, the name osmo_msc_data becomes even
more confusing than it already is. Clearly indicate it as libbsc's data of
a remote MSC by prefixing with bsc_.

Also, the Osmocom community has in the meantime agreed to have the osmo_
prefix only in libosmocore, to avoid naming conflicts in case things are
moved there. So while renaming anyway, also drop the osmo_ prefix.

Change-Id: I13554563ce9289de126ba0d4cf329bafcda35607
diff --git a/openbsc/src/osmo-bsc/osmo_bsc_audio.c b/openbsc/src/osmo-bsc/osmo_bsc_audio.c
index 660d884..1160209 100644
--- a/openbsc/src/osmo-bsc/osmo_bsc_audio.c
+++ b/openbsc/src/osmo-bsc/osmo_bsc_audio.c
@@ -20,7 +20,7 @@
  *
  */
 
-#include <openbsc/osmo_msc_data.h>
+#include <openbsc/bsc_msc_data.h>
 #include <openbsc/osmo_bsc.h>
 #include <openbsc/abis_rsl.h>
 #include <openbsc/gsm_data.h>