baytrail: Add MCFG table to ACPI

This adds the PCI configuration region table to baytrail.

BUG=chrome-os-partner:23505
BRANCH=rambi
TEST=build and boot on rambi

Change-Id: I0d975709a4a18d0f1c5e24581c9fd2190fe2996b
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/175627
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4937
Tested-by: build bot (Jenkins)

src/soc/intel/baytrail/acpi.c

@@ -56,3 +56,10 @@ void acpi_create_intel_hpet(acpi_hpet_t * hpet)
 	header->checksum =
 	    acpi_checksum((void *) hpet, sizeof(acpi_hpet_t));
 }
+
+unsigned long acpi_fill_mcfg(unsigned long current)
+{
+	current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *)current,
+					     MCFG_BASE_ADDRESS, 0, 0, 255);
+	return current;
+}

src/soc/intel/baytrail/placeholders.c

@@ -7,8 +7,6 @@
 
 void generate_cpu_entries(void) {}
 
-unsigned long acpi_fill_mcfg(unsigned long current) { return current; }
-
 void smm_init(void) {}
 
 /* Rmodules don't like weak symbols. */