tests/Makefile.common: Remove unnecessary dependency to kconfig/conf

Utility will be built while executing kconfig targets so it is not
necessary to keep hard dependency on kconfig here.

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: I578f3e1d9de63e91ded44746539265bcd55bf579
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70298
Reviewed-by: Jan Dabros <jsd@semihalf.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/tests/Makefile.common b/tests/Makefile.common
index 8cb39a0..e51d253 100644
--- a/tests/Makefile.common
+++ b/tests/Makefile.common
@@ -184,7 +184,7 @@
         KCONFIG_TRISTATE=$(TEST_KCONFIG_TRISTATE) \
         KBUILD_DEFCONFIG=$(TEST_DEFAULT_CONFIG)
 
-$(TEST_KCONFIG_AUTOHEADER): $(TEST_DOTCONFIG) $(objutil)/kconfig/conf
+$(TEST_KCONFIG_AUTOHEADER): $(TEST_DOTCONFIG)
 	mkdir -p $(dir $@)
 	$(MAKE) $(TEST_KCONFIG_FLAGS) olddefconfig
 	$(MAKE) $(TEST_KCONFIG_FLAGS) syncconfig