Rename gprs_gb.[c,h] -> gprs_ns.[c,h]

All remaining code in that file is NS protocol related, hence let's
rename it so that we end up with one file per protocol in the Gb stack.

Change-Id: I8312c8a70d60cab48764950c5b57ca02964e9db2
diff --git a/src/sgsn/Makefile.am b/src/sgsn/Makefile.am
index 8bc5ccb..f97d2ba 100644
--- a/src/sgsn/Makefile.am
+++ b/src/sgsn/Makefile.am
@@ -41,11 +41,11 @@
 
 osmo_sgsn_SOURCES = \
 	gprs_bssgp.c \
-	gprs_gb.c \
 	gprs_gmm_attach.c \
 	gprs_gmm.c \
 	gprs_gmm_fsm.c \
 	gprs_mm_state_gb_fsm.c \
+	gprs_ns.c \
 	gprs_sgsn.c \
 	gprs_sm.c \
 	gprs_sndcp.c \
diff --git a/src/sgsn/gprs_gb.c b/src/sgsn/gprs_ns.c
similarity index 100%
rename from src/sgsn/gprs_gb.c
rename to src/sgsn/gprs_ns.c
diff --git a/src/sgsn/gprs_sndcp.c b/src/sgsn/gprs_sndcp.c
index 3b9d28a..a0c35bf 100644
--- a/src/sgsn/gprs_sndcp.c
+++ b/src/sgsn/gprs_sndcp.c
@@ -32,7 +32,7 @@
 #include <osmocom/gprs/gprs_bssgp.h>
 
 #include <osmocom/sgsn/debug.h>
-#include <osmocom/sgsn/gprs_gb.h>
+#include <osmocom/sgsn/gprs_ns.h>
 #include <osmocom/sgsn/gprs_llc.h>
 #include <osmocom/sgsn/sgsn.h>
 #include <osmocom/sgsn/gprs_sndcp.h>
diff --git a/src/sgsn/sgsn_libgtp.c b/src/sgsn/sgsn_libgtp.c
index caab953..a2d0c7a 100644
--- a/src/sgsn/sgsn_libgtp.c
+++ b/src/sgsn/sgsn_libgtp.c
@@ -45,7 +45,7 @@
 #include <osmocom/sgsn/signal.h>
 #include <osmocom/sgsn/debug.h>
 #include <osmocom/sgsn/sgsn.h>
-#include <osmocom/sgsn/gprs_gb.h>
+#include <osmocom/sgsn/gprs_ns.h>
 #include <osmocom/sgsn/gprs_llc.h>
 #include <osmocom/sgsn/gprs_sgsn.h>
 #include <osmocom/sgsn/gprs_gmm.h>
diff --git a/src/sgsn/sgsn_main.c b/src/sgsn/sgsn_main.c
index 77797b9..b744310 100644
--- a/src/sgsn/sgsn_main.c
+++ b/src/sgsn/sgsn_main.c
@@ -61,7 +61,7 @@
 #include <osmocom/sgsn/gprs_llc.h>
 #include <osmocom/sgsn/gprs_gmm.h>
 #include <osmocom/sgsn/gprs_ranap.h>
-#include <osmocom/sgsn/gprs_gb.h>
+#include <osmocom/sgsn/gprs_ns.h>
 #include <osmocom/sgsn/gprs_bssgp.h>
 
 #include <osmocom/ctrl/control_if.h>
diff --git a/src/sgsn/sgsn_vty.c b/src/sgsn/sgsn_vty.c
index db76c35..7a94f79 100644
--- a/src/sgsn/sgsn_vty.c
+++ b/src/sgsn/sgsn_vty.c
@@ -35,7 +35,7 @@
 #include <osmocom/sgsn/debug.h>
 #include <osmocom/sgsn/sgsn.h>
 #include <osmocom/gprs/gprs_ns2.h>
-#include <osmocom/sgsn/gprs_gb.h>
+#include <osmocom/sgsn/gprs_ns.h>
 #include <osmocom/sgsn/gprs_gmm.h>
 #include <osmocom/sgsn/gprs_bssgp.h>
 #include <osmocom/sgsn/gprs_sgsn.h>