configs: Add Khadas VIM3 defconfig

Derived from odroid-n2_defconfig and README.odroid-n2.

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
3 files changed