* driver and APB DMA based serial driver for higher baudrate
* and performace. To enable the 8250 based driver, the compatible
* is "nvidia,tegra20-uart" and to enable the APB DMA based serial
* driver and APB DMA based serial driver for higher baudrate
* and performace. To enable the 8250 based driver, the compatible
* is "nvidia,tegra20-uart" and to enable the APB DMA based serial