SPI_INT_MASK
bcm_spi_writeb(bs, 0, SPI_INT_MASK);
bcm_spi_writeb(bs, SPI_INTR_CMD_DONE, SPI_INT_MASK);
bcm_spi_writeb(bs, 0, SPI_INT_MASK);
[SPI_INT_MASK] = SPI_6348_INT_MASK,
[SPI_INT_MASK] = SPI_6358_INT_MASK,
bcm_spi_writeb(bs, 0, SPI_INT_MASK);