arm: rmobile: alt: Remove board_late_init function

Alt board does not use board_late_init function.
This removes this function and define of BOARD_LATE_INIT from config.

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