Laptops with APUs from a variety of manufacturers and generations
show a warning about a missing PSP runtime database.

As it's not required for PSP to dump this database into framebuffer,
decrease messages about it missing to debug.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>