misc: Move from u_int to uint types of stdint.h

This was done with sed on the files.
diff --git a/openbsc/include/openbsc/gb_proxy.h b/openbsc/include/openbsc/gb_proxy.h
index 8a7911c..3c9ebe0 100644
--- a/openbsc/include/openbsc/gb_proxy.h
+++ b/openbsc/include/openbsc/gb_proxy.h
@@ -10,7 +10,7 @@
 
 struct gbproxy_config {
 	/* parsed from config file */
-	u_int16_t nsip_sgsn_nsei;
+	uint16_t nsip_sgsn_nsei;
 
 	/* misc */
 	struct gprs_ns_inst *nsi;