um: Include kbuild.h instead of duplicating its macros

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/x86/um/shared/sysdep/kernel-offsets.h

@@ -2,16 +2,9 @@
 #include <linux/sched.h>
 #include <linux/elf.h>
 #include <linux/crypto.h>
+#include <linux/kbuild.h>
 #include <asm/mman.h>
 
-#define DEFINE(sym, val) \
-	asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-
-#define BLANK() asm volatile("\n->" : : )
-
-#define OFFSET(sym, str, mem) \
-	DEFINE(sym, offsetof(struct str, mem));
-
 void foo(void)
 {
 #include <common-offsets.h>