ARM: dts: add pinctrl support to Exynos5410

Add the required pin configuration support to Exynos5410 using pinctrl
interface.
ARM: dts: exynos5410: Prepare ODROID-XU device tree

Derived from exynos5410-smdk5410.dts.

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: exynos5410: Add ODROID-XU LEDs

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: exynos5410: Enable USB

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: exynos5410: Add I2C

Signed-off-by: Andreas Färber <afaerber@suse.de>
clk: exynos5410: Add clocks for USB

Signed-off-by: Andreas Färber <andreas.faerber@web.de>