Fix build of bsc-nat and GPRS code after include path change

The last patch changed the osmocore include paths, this fixes some build
problems caused by it
diff --git a/openbsc/src/osmo-bsc_nat/bsc_filter.c b/openbsc/src/osmo-bsc_nat/bsc_filter.c
index 5765a66..74a5d19 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_filter.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_filter.c
@@ -26,7 +26,7 @@
 #include <openbsc/debug.h>
 
 #include <osmocom/core/talloc.h>
-#include <osmocom/core/protocol/gsm_08_08.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
 
 #include <osmocom/sccp/sccp.h>
 
diff --git a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
index 0c10d84..e3b57d9 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_mgcp_utils.c
@@ -29,8 +29,8 @@
 #include <osmocom/sccp/sccp.h>
 
 #include <osmocom/core/talloc.h>
-#include <osmocom/core/gsm0808.h>
-#include <osmocom/core/protocol/gsm_08_08.h>
+#include <osmocom/gsm/gsm0808.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
 
 #include <netinet/in.h>
 #include <arpa/inet.h>
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat.c b/openbsc/src/osmo-bsc_nat/bsc_nat.c
index fe78ee9..2075ab6 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat.c
@@ -44,11 +44,11 @@
 #include <openbsc/socket.h>
 #include <openbsc/vty.h>
 
-#include <osmocom/core/gsm0808.h>
+#include <osmocom/gsm/gsm0808.h>
 #include <osmocom/core/talloc.h>
 #include <osmocom/core/process.h>
 
-#include <osmocom/core/protocol/gsm_08_08.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
 
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/vty.h>
diff --git a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
index 6068333..f83289b 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_nat_utils.c
@@ -31,9 +31,9 @@
 
 #include <osmocom/core/linuxlist.h>
 #include <osmocom/core/talloc.h>
-#include <osmocom/core/gsm0808.h>
+#include <osmocom/gsm/gsm0808.h>
 
-#include <osmocom/core/protocol/gsm_08_08.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
 
 #include <osmocom/sccp/sccp.h>
 
diff --git a/openbsc/src/osmo-bsc_nat/bsc_ussd.c b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
index 8174336..14d154d 100644
--- a/openbsc/src/osmo-bsc_nat/bsc_ussd.c
+++ b/openbsc/src/osmo-bsc_nat/bsc_ussd.c
@@ -25,10 +25,10 @@
 #include <openbsc/ipaccess.h>
 #include <openbsc/socket.h>
 
-#include <osmocom/core/protocol/gsm_08_08.h>
-#include <osmocom/core/gsm0480.h>
+#include <osmocom/gsm/protocol/gsm_08_08.h>
+#include <osmocom/gsm/gsm0480.h>
 #include <osmocom/core/talloc.h>
-#include <osmocom/core/tlv.h>
+#include <osmocom/gsm/tlv.h>
 
 #include <osmocom/sccp/sccp.h>