nrf5/boards: Giving a bit more heap for nrf52840 linker script.
nrf5/boards: Giving a bit more heap for nrf52840 linker script.

tralamazza/micropython,tralamazza/micropython,adafruit/micropython,tralamazza/micropython,adafruit/micropython,adafruit/circuitpython,tralamazza/micropython,adafruit/micropython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython