radix tree test suite: Remove types.h

Move the pieces we still need to tools/include and update a few implicit
includes.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>

tools/testing/radix-tree/linux/gfp.h

@@ -1,6 +1,8 @@
 #ifndef _GFP_H
 #define _GFP_H
 
+#include <linux/types.h>
+
 #define __GFP_BITS_SHIFT 26
 #define __GFP_BITS_MASK ((gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
 

tools/testing/radix-tree/linux/types.h

@@ -1,23 +0,0 @@
-#ifndef _TYPES_H
-#define _TYPES_H
-
-#include "../../include/linux/types.h"
-
-#define __rcu
-#define __read_mostly
-
-static inline void INIT_LIST_HEAD(struct list_head *list)
-{
-	list->next = list;
-	list->prev = list;
-}
-
-typedef struct {
-	unsigned int x;
-} spinlock_t;
-
-#define uninitialized_var(x) x = x
-
-#include <linux/gfp.h>
-
-#endif