ARM: i.MX: Remove i.MX1 Synertronixx SCB9328 board support

Synertronixx SCB9328 board is very similar to Armadeus APF9328,
so it can be easily reimplemented in DT way.
This patch removes support for non-DT support for this board.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>