macbook21: switch off led before jumping to payload

Mimic vendor BIOS in switching off the led once coreboot has booted
successfully. Currently the led behavior is inconsistent. The led turns on
during poweron and stays on forever. When entering S3 and during S3 it
blinks and turns off after wake from S3. The behavior associated with S3
is the same under vendor BIOS and under coreboot. Switching off the led
before jumping to the payload makes the led behavior consistent within
coreboot before S3 and after wake from S3 and it makes the led behavior
consistent to vendor BIOS.

Change-Id: I0dec10b842b83dfc8054cd56d2750b724c4e8576
Signed-off-by: Axel Holewa <mono-for-coreboot@donderklumpen.de>
Reviewed-on: http://review.coreboot.org/10454
Tested-by: build bot (Jenkins)
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>

src/mainboard/apple/macbook21/Kconfig

@@ -8,6 +8,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select NORTHBRIDGE_INTEL_I945
 	select NORTHBRIDGE_INTEL_SUBTYPE_I945GM
 	select SOUTHBRIDGE_INTEL_I82801GX
+	select EC_ACPI
 	select HAVE_OPTION_TABLE
 	select HAVE_CMOS_DEFAULT
 	select HAVE_MP_TABLE

src/mainboard/apple/macbook21/mainboard.c

@@ -33,6 +33,7 @@
 #include <arch/x86/include/arch/acpigen.h>
 #include <smbios.h>
 #include <drivers/intel/gma/int15.h>
+#include <ec/acpi/ec.h>
 #define PANEL INT15_5F35_CL_DISPLAY_DEFAULT
 
 static acpi_cstate_t cst_entries[] = {
@@ -84,7 +85,13 @@ static void mainboard_enable(device_t dev)
 	dev->ops->init = mainboard_init;
 }
 
+static void mainboard_final(void *chip_info)
+{
+	ec_set_bit(0x10, 2); /* switch off led */
+}
+
 struct chip_operations mainboard_ops = {
 	.enable_dev = mainboard_enable,
+	.final = mainboard_final,
 };