superio/*/Makefiles: Remove non-existing directory inclusion

Change-Id: I080f5b67c6e555fcc025ec11a1d15dddfe3a546d
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44317
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/superio/ite/Makefile.inc

@@ -10,9 +10,7 @@ ramstage-$(CONFIG_SUPERIO_ITE_ENV_CTRL) += common/env_ctrl.c
 subdirs-y += it8528e
 subdirs-y += it8613e
 subdirs-y += it8623e
-subdirs-y += it8671f
 subdirs-y += it8712f
-subdirs-y += it8716f
 subdirs-y += it8718f
 subdirs-y += it8720f
 subdirs-y += it8721f