configs: apple: Use "vidconsole,serial" as stdout/stderr

The display size querying in efi_console relies on this order. The
display should be the primary output device and should be used to
display more than 80x25 chars.

Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Janne Grunau <j@jannau.net>