* Samsung's UART Controller

The Samsung's UART controller is used for interfacing SoC with serial communicaion
devices.

Required properties:
- compatible: should be
  - "samsung,exynos4210-uart", for UART's compatible with Exynos4210 uart ports.

- reg: base physical address of the controller and length of memory mapped
  region.

- interrupts: interrupt number to the cpu. The interrupt specifier format depends
  on the interrupt controller parent.
