add make config command

firmware/Makefile

@@ -23,6 +23,7 @@
 # If you wish to call make directly, here are the available commands:
 #
 # make docs-enums	Generate docs and enums
+# make config			Generate docs, enums, and configs
 # make						Generate docs, enums, configs, and build firmware
 # make bundle			Generate docs, enums, configs, built bootloader, build firmware, and package both full and autoupdate bundles
 #

firmware/rusefi_config.mk

@@ -65,3 +65,7 @@ else
 	bash $(PROJECT_DIR)/gen_config_board.sh $(BOARD_DIR) $(SHORT_BOARD_NAME)
 endif
 	@touch $@
+
+.PHONY: config
+
+config: .config-sentinel