nand_spl: simpc8313: move config.mk used only for nand_spl

board/sheldon/simpc8313/config.mk is used only for nand_spl.
So it should go into nand_spl/board/sheldon/simpc8313/.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2 files changed