arm: rmobile: kconfig: Remove '+S:' prefix from defconfig files

'+S' is unnecessary because boards of rmobile do not use SPL.
This removes from armadillo-800eva and kzm9g.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2 files changed