aopen/dxplplusu: Support SMM_ASEG and SMM_TSEG

Both SMM_ASEG and SMM_TSEG choices work.

There is periodic TCO timeout occurring.
At least with DEBUG_SMI kernel reports low memory corruption.

Change-Id: If20a7092117612a1a9e25eb6ac480e105acd57d7
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61517
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/southbridge/intel/i82801dx/Kconfig b/src/southbridge/intel/i82801dx/Kconfig
index 98c1a47..391a59f 100644
--- a/src/southbridge/intel/i82801dx/Kconfig
+++ b/src/southbridge/intel/i82801dx/Kconfig
@@ -3,7 +3,9 @@
 config SOUTHBRIDGE_INTEL_I82801DX
 	bool
 	select ACPI_INTEL_HARDWARE_SLEEP_VALUES
+	select HAVE_SMI_HANDLER
 	select SOUTHBRIDGE_INTEL_COMMON_SMBUS
+	select SOUTHBRIDGE_INTEL_COMMON_SMM
 	select SOUTHBRIDGE_INTEL_COMMON_EARLY_SMBUS
 	select SOUTHBRIDGE_INTEL_COMMON_RTC
 	select SOUTHBRIDGE_INTEL_COMMON_RESET