sb/intel/common: Create a common implementation of acpi_fill_madt()

The function `acpi_fill_madt()` is identical among all the Lynx Point
boards and sb/intel/bd82x6x, so share a common function between them.

Earlier Intel platforms have similar implementations of this function.
The common implementation might only need minor alterations to support
them.

Tested on an ASRock H81M-HDS and Google Peppy (variant of Slippy). No
issues arose from this patch.

Change-Id: Ife9e3917febf43d8a92cac66b502e2dee8527556
Signed-off-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-on: https://review.coreboot.org/29388
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/southbridge/intel/bd82x6x/Kconfig

@@ -41,6 +41,7 @@ config SOUTH_BRIDGE_OPTIONS # dummy
 	select RTC
 	select HAVE_INTEL_CHIPSET_LOCKDOWN
 	select SOUTHBRIDGE_INTEL_COMMON_SMM
+	select SOUTHBRIDGE_INTEL_COMMON_ACPI_MADT
 
 config EHCI_BAR
 	hex

src/southbridge/intel/bd82x6x/Makefile.inc

@@ -47,6 +47,6 @@ else
 romstage-y += early_me_mrc.c early_usb_mrc.c
 endif
 
-ramstage-y += madt.c early_pch_common.c
+ramstage-y += early_pch_common.c
 
 endif

src/southbridge/intel/common/Kconfig

@@ -30,6 +30,9 @@ config HAVE_INTEL_CHIPSET_LOCKDOWN
 config SOUTHBRIDGE_INTEL_COMMON_SMM
 	def_bool n
 
+config SOUTHBRIDGE_INTEL_COMMON_ACPI_MADT
+	bool
+
 config INTEL_DESCRIPTOR_MODE_CAPABLE
 	def_bool n
 	help

src/southbridge/intel/common/Makefile.inc

@@ -52,4 +52,6 @@ ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_RCBA_PIRQ) += rcba_pirq.c
 ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMM) += pmutil.c smi.c
 smm-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_SMM) += pmutil.c smihandler.c
 
+ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_ACPI_MADT) += madt.c
+
 endif

src/southbridge/intel/common/madt.c

@@ -13,13 +13,8 @@
  * GNU General Public License for more details.
  */
 
-#include <types.h>
-#include <string.h>
-#include <cbmem.h>
-#include <console/console.h>
 #include <arch/acpi.h>
 #include <arch/ioapic.h>
-#include <arch/acpigen.h>
 #include <arch/smp/mpspec.h>
 
 unsigned long acpi_fill_madt(unsigned long current)

src/southbridge/intel/lynxpoint/Kconfig

@@ -24,6 +24,7 @@ config SOUTH_BRIDGE_OPTIONS # dummy
 	select SOUTHBRIDGE_INTEL_COMMON
 	select SOUTHBRIDGE_INTEL_COMMON_SMBUS
 	select SOUTHBRIDGE_INTEL_COMMON_SPI
+	select SOUTHBRIDGE_INTEL_COMMON_ACPI_MADT
 	select IOAPIC
 	select HAVE_USBDEBUG_OPTIONS
 	select USE_WATCHDOG_ON_BOOT