Makefile: No echoing for 'make help V=1'

It doesn't bring much to have echoing with "make help". Suppress it
unconditionally.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <160459122012.462591.8467906402712875729.stgit@bahia.lan>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Makefile

@@ -270,7 +270,7 @@ include $(SRC_PATH)/tests/docker/Makefile.include
 include $(SRC_PATH)/tests/vm/Makefile.include
 
 print-help-run = printf "  %-30s - %s\\n" "$1" "$2"
-print-help = $(quiet-@)$(call print-help-run,$1,$2)
+print-help = @$(call print-help-run,$1,$2)
 
 .PHONY: help
 help: