Fix Mac crash when waking up with an ejected CIRCUITPY

We now correctly set the reason for the unit not being ready and always start the unit. Fixes adafruit#2567

Author: tannewt

supervisor/shared/usb/usb_msc_flash.c

@@ -208,6 +208,8 @@ bool tud_msc_test_unit_ready_cb(uint8_t lun) {
  return false;
  }
  if (ejected[lun]) {
+ // Set 0x3a for media not present.
+ tud_msc_set_sense(lun, SCSI_SENSE_NOT_READY, 0x3A, 0x00);
  return false;
  }
 
@@ -243,10 +245,8 @@ bool tud_msc_start_stop_cb(uint8_t lun, uint8_t power_condition, bool start, boo
  if (disk_ioctl(current_mount, CTRL_SYNC, NULL) != RES_OK) {
  return false;
  }
- } else {
- // Start the unit, but only if not ejected.
- return !ejected[lun];
  }
+ // Always start the unit, even if ejected. Whether media is present is a separate check.
  }
 
  return true;