aopen/dxplplusu: Use ACPI_COMMON_MADT_IOAPIC

IRQ override from IRQ #0 to GSI #2 is changed from
MP_BUS_EISA to MP_BUS_ISA.

Change-Id: I115df037fd79e120b04e6aff9e53f963f045b997
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74352
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/aopen/dxplplusu/Kconfig

@@ -2,6 +2,7 @@ if BOARD_AOPEN_DXPLPLUSU
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
+	select ACPI_CUSTOM_MADT
 	select CPU_INTEL_SOCKET_MPGA604
 	select NORTHBRIDGE_INTEL_E7505
 	select SOUTHBRIDGE_INTEL_I82870

src/mainboard/aopen/dxplplusu/acpi_tables.c

@@ -8,9 +8,6 @@ unsigned long acpi_fill_madt(unsigned long current)
 	struct device *bdev, *dev = NULL;
 	struct resource *res = NULL;
 
-	/* Southbridge IOAPIC */
-	current += acpi_create_madt_ioapic_from_hw((acpi_madt_ioapic_t *)current, 0xfec00000);
-
 	bdev = pcidev_on_root(2, 0);
 	/* P64H2 Bus B IOAPIC */
 	if (bdev)
@@ -28,11 +25,5 @@ unsigned long acpi_fill_madt(unsigned long current)
 		current += acpi_create_madt_ioapic_from_hw((acpi_madt_ioapic_t *)current, res->base);
 	}
 
-	/* Map ISA IRQ 0 to IRQ 2 */
-	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)current, 1, 0, 2, 0);
-
-	/* IRQ9 differs from ISA standard - ours is active high, level-triggered */
-	current += acpi_create_madt_irqoverride((acpi_madt_irqoverride_t *)current, 0, 9, 9, 0xD);
-
 	return current;
 }

src/southbridge/intel/i82801dx/Kconfig

@@ -2,6 +2,7 @@
 
 config SOUTHBRIDGE_INTEL_I82801DX
 	bool
+	select ACPI_COMMON_MADT_IOAPIC
 	select ACPI_COMMON_MADT_LAPIC
 	select ACPI_INTEL_HARDWARE_SLEEP_VALUES
 	select HAVE_SMI_HANDLER