um: get rid of pointless include "..." where include <...> will do

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/x86/um/mem_64.c b/arch/x86/um/mem_64.c
index 5465187..c6492e7 100644
--- a/arch/x86/um/mem_64.c
+++ b/arch/x86/um/mem_64.c
@@ -1,6 +1,6 @@
-#include "linux/mm.h"
-#include "asm/page.h"
-#include "asm/mman.h"
+#include <linux/mm.h>
+#include <asm/page.h>
+#include <asm/mman.h>
 
 const char *arch_vma_name(struct vm_area_struct *vma)
 {