fix(board): Correct display init for Pimoroni Explorer (RP2350) #130

Job	Run time
scheduler	51s
mpy-cross-mac	45s
mpy-cross / build (static-mingw)	46s
tests / zephyr	3m 25s
tests / run (native_mpy)	38s
tests / run (mpy)	43s
mpy-cross / build (static-aarch64)	37s
mpy-cross / build (static)	25s
tests / run (native)	51s
mpy-cross / build (static-raspbian)	42s
tests / run (all)	1m 6s
windows	-1s
windows-zephyr	-1s
docs	-1s
ports (raspberrypi) / board (pimoroni_explorer2350)	2m 30s
	13m 16s

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