header file restructuring
Move all protocol definitions to protocol/*.h and keep only
definitions related to our implementation as *.h in the top directory.
Also, remove some header files to reduce header file proliferation.
diff --git a/src/diag_msg.c b/src/diag_msg.c
index 646663e..b17106d 100644
--- a/src/diag_msg.c
+++ b/src/diag_msg.c
@@ -7,9 +7,9 @@
#include <osmocom/core/bit16gen.h>
#include <osmocom/core/bit32gen.h>
-#include "protocol.h"
+#include "protocol/protocol.h"
#include "diag_msg.h"
-#include "diagcmd.h"
+#include "protocol/diagcmd.h"
struct diag_set_rt_mask_req {
uint8_t cmd_code;