soc/amd/cezanne: add 0xcf9 reset

Change-Id: Ibb78661c102e0d0327f3e74173bf98bc40e13960
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48488
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Mathew King <mathewk@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/amd/cezanne/Kconfig b/src/soc/amd/cezanne/Kconfig
index be45de4..be4d432 100644
--- a/src/soc/amd/cezanne/Kconfig
+++ b/src/soc/amd/cezanne/Kconfig
@@ -13,6 +13,7 @@
 	select ARCH_VERSTAGE_X86_32
 	select ARCH_ROMSTAGE_X86_32
 	select ARCH_RAMSTAGE_X86_32
+	select HAVE_CF9_RESET
 	select IOAPIC
 	select RESET_VECTOR_IN_RAM
 	select SOC_AMD_COMMON