[RFC PATCHv5] arm: socfpga: Add initial support for Altera's SOCFPGA HW

[dinguyen at altera.com]

From: Dinh Nguyen <dinguyen at altera.com>

This patch adds minimal support for Altera's SOCFPGA hardware.

Changes since v4:
- Removed common.h

Changes since v3:
- Condensed to 1 patch per Pavel Machek
- Added only root clocks(fixed-rate) definitions in drivers/clk/socfpga
- Update dtsi file per Thomas Petazzoni's recommendation
- Add extern sys_timer dw_apb_timer declaration in include/linux/dw_apb_timer.h

Changes since v2:
- Make use of COMMON_CLK - socfpga folder under drivers/clk
- Add maintainer entry for drivrs/clk/socfpga
- Incorporated changes suggestd by Thomas Petazzoni, Arnd Bergmann,
and Rob Herring
- Added Reviewed-by: Rob Herring <rob.herring at calxeda.com>

Changes since v1:
- Incorporate changes suggested by Pavel Machek, Thommas Petazzoni,
  Arnd Bergmann, and Rob Herring
- Reduce the patch to a make as much use of DTS as possible

Dinh Nguyen (1):
  ARM: socfpga: initial support for Altera's SOCFPGA platform

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1.7.9.5