x86: Drop BOARD_HAS_FADT

There is a wildcard rule to include mainboard/fadt.c.

Change-Id: I7f59d6b241c683b62c2c41c5795e45184882635e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/2940
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/mainboard/intel/baskingridge/Kconfig

@@ -7,7 +7,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select NORTHBRIDGE_INTEL_HASWELL
 	select SOUTHBRIDGE_INTEL_LYNXPOINT
 	select BOARD_ROMSIZE_KB_8192
-	select BOARD_HAS_FADT
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME