staging/olpc: xo_1 needs delay.h

From: Randy Dunlap <[email protected]>

Fix build error, needs delay.h:

drivers/staging/olpc_dcon/olpc_dcon_xo_1.c:168: error: implicit declaration of function 'udelay'

---
 drivers/staging/olpc_dcon/olpc_dcon_xo_1.c |    1 +
 1 file changed, 1 insertion(+)

Can we get something in MAINTAINERS for OLPC, please?

@@ -11,6 +11,7 @@
  * License as published by the Free Software Foundation.
  */
 #include <linux/cs5535.h>
+#include <linux/delay.h>
 #include <linux/gpio.h>
 #include <asm/olpc.h>