Add legacy free setting and override to fadt.c

The FADT iapc_boot_arch indicates the available information
for accessing legacy devices. By default, the setting supports
legacy. LEGACY_FREE and/or the iapc_boot_arch field may be
customized.

Change-Id: I5679741e1f8db923d3c00b57f6a5d813550f3a5e
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/1024
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Peter Stuge <peter@stuge.se>
1 file changed