This commit adds a debugging configuration file for the t400_8mb image,
enabling building debugging images with UART console support and RAM
initialization debugging messages, for both corebootfb and txtmode displays.
Signed-off-by: Adrien 'neox' Bourmault <neox@gnu.org>
Acked-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
