configs: Drop references to CPU_QEMU_X86_SMMLOADERV2

This follows commit 88407bcd which removed the symbol. Since Kconfig
is going to become more strict about unknown symbols, fix it.

Change-Id: I19d26de8003c51437ea62e04083a14c3587a4665
Signed-off-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79254
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/configs/config.emulation_qemu_x86_q35_smm_tseg b/configs/config.emulation_qemu_x86_q35_smm_tseg
index 4b3e6e5..0ec233b 100644
--- a/configs/config.emulation_qemu_x86_q35_smm_tseg
+++ b/configs/config.emulation_qemu_x86_q35_smm_tseg
@@ -1,4 +1,3 @@
 CONFIG_VENDOR_EMULATION=y
 CONFIG_BOARD_EMULATION_QEMU_X86_Q35=y
 CONFIG_CPU_QEMU_X86_TSEG_SMM=y
-CONFIG_CPU_QEMU_X86_SMMLOADERV2=y