{bd82x6x,i82801gx,ibexpeak,lynxpoint}: Remove dead code and use macro

Use BIOS_CNTL defined macro instead of magic number.

Change-Id: I0d2b555ada9c2893af4f85422128f5a8b04e2fc6
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/29990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/soc/intel/fsp_baytrail/southcluster.c

@@ -42,9 +42,6 @@
 #include "chip.h"
 #include <arch/acpi.h>
 
-#define ENABLE_ACPI_MODE_IN_COREBOOT	0
-#define TEST_SMM_FLASH_LOCKDOWN		0
-
 typedef struct soc_intel_fsp_baytrail_config config_t;
 
 static inline void