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/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 5888f1b..ae02909 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -23,9 +23,9 @@
 				   pte_present gives true */
 
 #ifdef CONFIG_3_LEVEL_PGTABLES
-#include "asm/pgtable-3level.h"
+#include <asm/pgtable-3level.h>
 #else
-#include "asm/pgtable-2level.h"
+#include <asm/pgtable-2level.h>
 #endif
 
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];