soc/apollolake: Populate fields in FADT to enable\disable SCI

This will allow kernel to trigger a APM SMI to enable\disable SCI

Change-Id: I1be79b7a3082c23fbaf204eff55360c46458e325
Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Reviewed-on: https://review.coreboot.org/15347
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
diff --git a/src/soc/intel/apollolake/acpi.c b/src/soc/intel/apollolake/acpi.c
index d24416f..a38c377 100644
--- a/src/soc/intel/apollolake/acpi.c
+++ b/src/soc/intel/apollolake/acpi.c
@@ -85,7 +85,9 @@
 	fadt->header.revision = ACPI_FADT_REV_ACPI_5_0;
 
 	fadt->sci_int = acpi_sci_irq();
-	fadt->smi_cmd = 0;	/* No Smi Handler as SMI_CMD is 0*/
+	fadt->smi_cmd = APM_CNT;
+	fadt->acpi_enable = APM_CNT_ACPI_ENABLE;
+	fadt->acpi_disable = APM_CNT_ACPI_DISABLE;
 
 	fadt->pm1a_evt_blk = pmbase + PM1_STS;
 	fadt->pm1a_cnt_blk = pmbase + PM1_CNT;