build: use ARCHTYPE instead of DESTCPU

Signed-off-by: Stewart X Addison <sxa@ibm.com>

Author: sxa

Makefile

@@ -844,7 +844,7 @@ else ifeq ($(OSTYPE),os400)
 # TODO(@nodejs/web-infra): IBMi is currently hanging during HTML minification
 $(apidocs_html) $(apidocs_json) out/doc/api/all.html out/doc/api/all.json:
 	@echo "Skipping $@ (not currently supported by $(OSTYPE) machines)"
-else ifeq ($(DESTCPU),riscv64)
+else ifeq ($(ARCHTYPE),riscv64)
 # Many riscv64 environments (except qemu) fail on the wasm steps here
 # https://github.com/nodejs/build/issues/4099#issuecomment-4038743335
 $(apidocs_html) $(apidocs_json) out/doc/api/all.html out/doc/api/all.json: