include: add includes includes to make fdt.h, of.h and state.h self contained

Otherwise compilation may fail with:

include/fdt.h:11:15: error: unknown type name 'uint64_t'
 static inline uint64_t fdt64_to_cpu(uint64_t x)

include/of.h:22:19: error: field 'list' has incomplete type
  struct list_head list;

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

include/fdt.h

@@ -1,6 +1,8 @@
 #ifndef _FDT_H
 #define _FDT_H
 
+#include <linux/types.h>
+
 #ifndef __ASSEMBLY__
 
 #define _B(n)	((unsigned long long)((uint8_t *)&x)[n])

include/of.h

@@ -3,6 +3,8 @@
 
 #include <fdt.h>
 #include <errno.h>
+#include <linux/types.h>
+#include <linux/list.h>
 #include <asm/byteorder.h>
 
 /* Default string compare functions */

include/state.h

@@ -1,6 +1,8 @@
 #ifndef __STATE_H
 #define __STATE_H
 
+#include <of.h>
+
 struct state;
 
 int state_backend_dtb_file(struct state *state, const char *path);