Makefile: Use 'go tool' instead of manual path building

Author: ipatix

Makefile

@@ -1,5 +1,4 @@
 CFORGO = c-for-go
-CGO = $(shell go env GOTOOLDIR)/cgo
 
 all: generate
 
@@ -17,7 +16,7 @@ generate:
 		    rocm_smi/rocm_smi.h.orig > rocm_smi/rocm_smi.h
 	cd pkg/rocm_smi && $(CFORGO) -ccincl --ccdefs ../../rocm_smi.yml
 	cd pkg/rocm_smi && \
-		$(CGO) -godefs types.go > types.go.expand && \
+		go tool cgo -godefs types.go > types.go.expand && \
 		mv types.go.expand types.go && \
 		rm -f _cgo_2.o
 	cd pkg/rocm_smi && \