EXYNOS5250: FDT: Add device tree support for console

Enabled fdt support for default console on EXYNOS5250.

Changes in V2:
- Changed the compatible string to "samsung,exynos4210-uart"
Changes in V3:
- Rebased the patchset on latest u-boot-samsung branch.
- Added a alias console as we will support one at any point of time.
- Moved driver config structure to data section.
- Changed silent_console to silent-console.
- Did put a check for base address before doing fdt decoding.
Changes in V4:
- Rebased the patchset on latest u-boot-samsung branch.
- Changed to COMPAT_SAMSUNG_EXYNOS5_SERIAL to COMPAT_SAMSUNG_EXYNOS_SERIAL
Changes in V5:
- Added serial device node for Snow board.
Changes in V6:
- Rebased the patchset on latest u-boot-samsung branch.
- Changed the if..else condition to a switch statement.
- Moved compatible strings up with all other samsung strings.
Changes in V7:
- Removed a extra line.

Rajeshwari Shinde (4):
EXYNOS5: FDT: Add compatible strings for Serial
EXYNOS5: FDT: Add serial device node values
S5P: Serial: Add fdt support to driver
CONFIG: EXYNOS5: Enable silent console

 arch/arm/dts/exynos5250.dtsi              |   27 ++++++++++
 board/samsung/dts/exynos5250-smdk5250.dts |    2 +
 board/samsung/dts/exynos5250-snow.dts     |    2 +
 drivers/serial/serial_s5p.c               |   78 +++++++++++++++++++++++++++++
 include/configs/exynos5250-dt.h           |    2 +-
 include/fdtdec.h                          |    1 +
 lib/fdtdec.c                              |    1 +
 7 files changed, 112 insertions(+), 1 deletions(-)