Makefile: remove superfluous softi2c pullup configuration

	COMMON_FLAGS += -DF_TIMER=${CONFIG_timer_freq}

endif

ifdef CONFIG_driver_softi2c_pullup_dynamic_internal

	softi2c_pullup=internal

endif

ifeq (${softi2c_pullup}, internal)

	COMMON_FLAGS += -DCONFIG_driver_softi2c_pullup_dynamic_internal

endif

ifdef CONFIG_driver_softi2c_pullup_dynamic_external

	softi2c_pullup=external

endif

ifeq (${softi2c_pullup}, external)

	COMMON_FLAGS += -DCONFIG_driver_softi2c_pullup_dynamic_external

endif

ifdef CONFIG_driver_softi2c_pullup_external

	softi2c_pullup=gpio

endif

ifeq (${softi2c_pullup}, gpio)

	COMMON_FLAGS += -DCONFIG_driver_softi2c_pullup_external

endif

ifeq (${i2c_pullup}, gpio)

	COMMON_FLAGS += -DCONFIG_I2C_PULLUP_FIXED_GPIO

endif

ifeq (${softi2c_timer}, 1)

	override arch_drivers += ,timer

	COMMON_FLAGS += -DSOFTI2C_TIMER

	@echo "    loop -- enable loop() function"

	@echo "    i2c_freq -- I2C Frequency in Hz"

	@echo "    timer_freq -- Timer frequency in Hz"

	@echo "    softi2c_pullup -- When using softi2c driver: configure SDA/SCL pull-ups"

	@echo "        internal: Use internal pull-ups. Pull-ups are disabled when transmitting a LOW signal"

	@echo "        external: Use external pull-ups connected to two separate CPU pins. Pull-Ups are disabled when transmitting a LOW signal"

	@echo "        gpio: Use external pull-ups connected to two separate CPU pins. Pull-Ups are always enabled"

	@echo "    softi2c_timer -- Use hardware timer instead of busy waiting for I2C timing"

	@echo "    i2c_pullup -- When using arch i2c driver: configure SDA/SCL pull-ups"

	@echo "        gpio: Use external pull-ups connected to two separate CPU pins. Pull-Ups are always enabled"

	@echo "    kout_nop -- Do not write output to stdout / serial console"

	@echo "    trace_malloc -- trace mpmalloc/mpcalloc/mprealloc calls on stdout"

	@echo "    stack_usage -- Generate .su files for stack usage estimation (-> make stack)"