soc/amd/*/Kconfig: remove redundant SMM_TSEG condition

Since SMM is in TSEG on the platforms which is the default, drop the
SMM_TSEG condition for the default of SMM_TSEG_SIZE.

Change-Id: I7bd965c0794efa12ea4886a55522cc5193a1d3ac
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50498
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/amd/stoneyridge/Kconfig b/src/soc/amd/stoneyridge/Kconfig
index 728e063..a1b109e 100644
--- a/src/soc/amd/stoneyridge/Kconfig
+++ b/src/soc/amd/stoneyridge/Kconfig
@@ -258,7 +258,7 @@
 
 config SMM_TSEG_SIZE
 	hex
-	default 0x800000 if SMM_TSEG && HAVE_SMI_HANDLER
+	default 0x800000 if HAVE_SMI_HANDLER
 	default 0x0
 
 config SMM_RESERVED_SIZE