[LoRaWAN] Fix ADR backoff difference between 1.0.4 and 1.1 #1658

Job	Run time
rpi-build	1m 40s
rpi-pico-build	48s
esp-build	3m 45s
arduino:avr:mega	8m 42s
tock-build	1m 44s
arduino:mbed:nano33ble	2m 22s
arduino:mbed:envie_m4	3m 51s
arduino:megaavr:uno2018	2m 31s
arduino:sam:arduino_due_x	3m 51s
arduino:samd:arduino_zero_native	2m 13s
adafruit:samd:adafruit_feather_m0	2m 27s
adafruit:nrf52:feather52832	2m 27s
esp32:esp32:esp32	4m 57s
esp8266:esp8266:generic	2m 29s
STMicroelectronics:stm32:GenF3:pnum=BLACKPILL_F303CC	2m 26s
STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_WL55JC1	4m 7s
stm32duino:STM32F1:mapleMini	2m 27s
MegaCoreX:megaavr:4809	2m 21s
arduino:mbed_rp2040:pico	2m 37s
rp2040:rp2040:rpipico	2m 17s
CubeCell:CubeCell:CubeCell-Board	2m 48s
MegaCore:avr:1281	2m 25s
teensy:avr:teensy41	4m 49s
arduino:renesas_uno:minima	2m 15s
SiliconLabs:silabs:xg24explorerkit	2m 21s
rpi-test	12s
metrics	2s
	1h 14m 54s

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