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/northbridge/intel/e7505/Kconfig b/src/northbridge/intel/e7505/Kconfig
index 4a54bc0..95e8de7 100644
--- a/src/northbridge/intel/e7505/Kconfig
+++ b/src/northbridge/intel/e7505/Kconfig
@@ -10,5 +10,6 @@
 	select NO_ECAM_MMCONF_SUPPORT
 	select HAVE_DEBUG_RAM_SETUP
 	select NO_CBFS_MCACHE
+	select SMM_TSEG
 
 endif