fill_slices
flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_NAND, false);
flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_CFI, false);
flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_SPI, false);
static int fill_slices(device_t dev, const char *provider,