novena: Remove empty reset_cpu()

There is really no need to provide an empty reset_cpu() implementation,
so just remove it.

Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>

board/kosagi/novena/novena_spl.c

@@ -607,7 +607,3 @@ void board_init_f(ulong dummy)
 	/* load/boot image from boot device */
 	board_init_r(NULL, 0);
 }
-
-void reset_cpu(ulong addr)
-{
-}