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/drivers/net_user.c b/arch/um/drivers/net_user.c
index 05090c3..cd14157 100644
--- a/arch/um/drivers/net_user.c
+++ b/arch/um/drivers/net_user.c
@@ -11,9 +11,9 @@
 #include <string.h>
 #include <sys/socket.h>
 #include <sys/wait.h>
-#include "net_user.h"
-#include "os.h"
-#include "um_malloc.h"
+#include <net_user.h>
+#include <os.h>
+#include <um_malloc.h>
 
 int tap_open_common(void *dev, char *gate_addr)
 {