Update RP2350 cache flushing #9770
Description
New info from RPI engineers give a slightly better/safer method.
earlephilhower/arduino-pico#2563
https://forums.raspberrypi.com/viewtopic.php?t=378249#p2263677
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New info from RPI engineers give a slightly better/safer method.
earlephilhower/arduino-pico#2563
https://forums.raspberrypi.com/viewtopic.php?t=378249#p2263677