fix against regression of AVR build #164

Job	Run time
build (esp8266:esp8266:nodemcuv2)	3m 28s
build (esp32:esp32:esp32:PartitionScheme=min_spiffs)	6m 2s
build (esp32:esp32:esp32s2)	7m 5s
build (esp32:esp32:esp32s3)	9m 24s
build (esp32:esp32:esp32c3)	9m 10s
build (STM32:stm32:Nucleo_64)	3m 16s
build (STMicroelectronics:stm32:GenF1)	4m 22s
build (STMicroelectronics:stm32:GenWL)	4m 8s
build (raspberry)	1m 12s
build (CubeCell:CubeCell:CubeCell-GPS)	6m 17s
build (CubeCell:CubeCell:CubeCell-Board-PRO)	4m 58s
build (adafruit:nrf52:pca10056)	5m 0s
build (arduino:samd:mzero_bl)	3m 46s
build (arduino:avr:mega)	41s
build (rp2040:rp2040:generic)	4m 43s
build (rp2040:rp2040:rpipicow)	7m 48s
	1h 21m 20s

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