kallsyms: include <asm/bitsperlong.h> instead of <asm/types.h>

<asm/bitsperlong.h> is enough to include the definition of
BITS_PER_LONG.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index f1b5749..03ff265 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -331,7 +331,7 @@
 	unsigned int *markers;
 	char buf[KSYM_NAME_LEN];
 
-	printf("#include <asm/types.h>\n");
+	printf("#include <asm/bitsperlong.h>\n");
 	printf("#if BITS_PER_LONG == 64\n");
 	printf("#define PTR .quad\n");
 	printf("#define ALGN .balign 8\n");