am335x: sl50: Enable CONFIG_AUTOBOOT_KEYED

On startup the SL50 board halt at U-Boot prompt. Use CONFIG_AUTOBOOT_KEYED
to enable autoboot for this board and define the <SPACE> key to get the
U-Boot prompt.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
1 file changed