atmel-samd: USB presentation of SD card and other mounted file systems causes USB disconnection #10669
Description
If CIRCUITPY_SDCARD_USB is enabled on atmel-samd boards, it causes a USB disconnect a few seconds after an SD card is mounted and presented via the second LUN.
This is a bug discovered during #10645, so USB SD card presentation was turned off for atmel-samd.
#10668 seems to fix this problem, so after that is merged, I'll make a separate PR to turn CIRCUITPY_SDCARD_USB back on for atmel-samd.