ACPI: Have common acpi_fill_mcfg()

As long as there is only one PCI segment we do not need
more complicated MCFG generation.

Change-Id: Ic2a8e84383883039bb7f994227e2e425366f9e13
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50666
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/quark/acpi.c

@@ -10,11 +10,6 @@ unsigned long acpi_fill_madt(unsigned long current)
 	return current;
 }
 
-unsigned long acpi_fill_mcfg(unsigned long current)
-{
-	return current;
-}
-
 void acpi_fill_fadt(acpi_fadt_t *fadt)
 {
 	struct device *dev = pcidev_on_root(PCI_DEVICE_NUMBER_QNC_LPC,