mx6ul_14x14_evk: Remove empty reset_cpu()

There is really no need to provide an empty reset_cpu() implementation,
so just remove it.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>

board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c

@@ -811,8 +811,4 @@ void board_init_f(ulong dummy)
 	/* load/boot image from boot device */
 	board_init_r(NULL, 0);
 }
-
-void reset_cpu(ulong addr)
-{
-}
 #endif