soc/amd/stoneyridge: Move acpi_fill_mcfg to northbridge

Relocate the function to the more appropriate file.

Change-Id: I92a3e8d0461ae228f6c01567db159e2458de5f6b
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32550
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/amd/stoneyridge/northbridge.c

@@ -176,6 +176,18 @@ static void northbridge_init(struct device *dev)
 	setup_ioapic((u8 *)IO_APIC2_ADDR, CONFIG_MAX_CPUS+1);
 }
 
+unsigned long acpi_fill_mcfg(unsigned long current)
+{
+
+	current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *)current,
+					     CONFIG_MMCONF_BASE_ADDRESS,
+					     0,
+					     0,
+					     CONFIG_MMCONF_BUS_NUMBER);
+
+	return current;
+}
+
 static unsigned long acpi_fill_hest(acpi_hest_t *hest)
 {
 	void *addr, *current;