gprs_bssgp_prim.h: Add missing includes

Includes for struct gprs_ra_id and osmo_eutran_tai were missing.

Change-Id: I1c068b6841561003d4d7722daa6c2abb21363dda
diff --git a/include/osmocom/gprs/gprs_bssgp_rim.h b/include/osmocom/gprs/gprs_bssgp_rim.h
index 0810c8e..55341de 100644
--- a/include/osmocom/gprs/gprs_bssgp_rim.h
+++ b/include/osmocom/gprs/gprs_bssgp_rim.h
@@ -25,7 +25,9 @@
 
 #pragma once
 
+#include <osmocom/gsm/gsm48.h>
 #include <osmocom/gprs/protocol/gsm_08_18.h>
+#include <osmocom/gprs/protocol/gsm_24_301.h>
 
 enum bssgp_rim_routing_info_discr {
 	BSSGP_RIM_ROUTING_INFO_GERAN,