Use ACPI text fields consistently with all other boards

Use ACPI text fields consistently with all other boards

LXBIOS and LXB-DSDT are not used in other parts of the tree.
Make names consistent across the tree.

Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Change-Id: I91caeac09fd2401a36e53bd061d249b236a48e43
Reviewed-on: http://review.coreboot.org/224
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>