phy: Add driver for Exynos MIPI CSIS/DSIM DPHYs

Add a PHY provider driver for the Samsung S5P/Exynos SoC MIPI CSI-2
receiver and MIPI DSI transmitter DPHYs.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc Documentation/devicetree/bindings/phy/samsung-phy.txt
Simple merge

diff --cc drivers/phy/Kconfig
Simple merge

diff --cc drivers/phy/Makefile
Simple merge

diff --cc drivers/phy/phy-exynos-mipi-video.c
Simple merge