Use CALLED_FROM_SETUP instead of KATI

So that we can use kati instead of make for the initial config loading.

Test: m clean; m nothing
Test: USE_GOMA=true m nothing
Test: m PRODUCT-aosp_x86-sdk
Test: m APP-Calculator
Test: multiproduct_kati -only-config  (on AOSP and internal master)
Change-Id: I5d3af847607fa48868c2045401977eca37dc6ae1
diff --git a/core/config.mk b/core/config.mk
index 566faae..7007c5d 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -304,7 +304,7 @@
 include $(BUILD_SYSTEM)/combo/select.mk
 endif
 
-ifndef KATI
+ifeq ($(CALLED_FROM_SETUP),true)
 include $(BUILD_SYSTEM)/ccache.mk
 include $(BUILD_SYSTEM)/goma.mk
 
@@ -900,7 +900,7 @@
     vbmetaimage-nodeps \
     product-graph dump-products
 
-ifndef KATI
+ifeq ($(CALLED_FROM_SETUP),true)
 include $(BUILD_SYSTEM)/ninja_config.mk
 include $(BUILD_SYSTEM)/soong_config.mk
 endif