Convert AOpen DXPL Plus mainboard to CAR

Tested on real hardware, mainboard with dual Xeon P4 HT CPUs
requires cache-as-ram init code with AP SIPI protocol.

Also enable 2nd CPU and PATA and clean-up Kconfig and ACPI.

Change-Id: I415482f3af22df79d82492c49aed83549f29aa56
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/886
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
6 files changed