Remove rest_octets.h

The MSC should not fiddle with low-level SI details like rest octets
anyway. Unfortunately simply removing the header is impossible as it
causes massive fallout due to missing includes. Fixed it as well.

The only other parameter which required removal is cell_ro_sel_par which
is not referenced anywhere in the code anyway.

Change-Id: Ibff77330de056fad4288cd4c48d016aad8105354
diff --git a/include/osmocom/msc/msc_ifaces.h b/include/osmocom/msc/msc_ifaces.h
index d46dfe9..0592c07 100644
--- a/include/osmocom/msc/msc_ifaces.h
+++ b/include/osmocom/msc/msc_ifaces.h
@@ -2,6 +2,7 @@
 
 #include <osmocom/core/msgb.h>
 #include <osmocom/msc/gsm_data.h>
+#include <osmocom/msc/transaction.h>
 
 /* These are the interfaces of the MSC layer towards (from?) the BSC and RNC,
  * i.e. in the direction towards the mobile device (MS aka UE).