After removing the Apollon board, remove the OneNAND IPL too.
There are no users for it any more.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Minkyu Kang <promsoft@gmail.com>
Cc: Tom Rini <trini@ti.com>
Acked-by: Minkyu Kang <mk7.kang@samsung.com>