Revert "of/exynos_g2d: Add Bindings for exynos G2D driver"

This reverts commit 09495dda.
The description is incomplete and the location of this file
is incorrect. Based on discussion with the Samsung media and DRM subsystem
maintainers, the documentaion of Samsung G2D bindings has been placed at:
Documentation/devicetree/bindings/gpu/samsung-g2d.txt
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

Documentation/devicetree/bindings/drm/exynos/g2d.txt

-Samsung 2D Graphic Accelerator using DRM frame work
-
-Samsung FIMG2D is a graphics 2D accelerator which supports Bit Block Transfer.
-We set the drawing-context registers for configuring rendering parameters and
-then start rendering.
-This driver is for SOCs which contain G2D IPs with version 4.1.
-
-Required properties:
-	-compatible:
-		should be "samsung,exynos-g2d-41".
-	-reg:
-		physical base address of the controller and length
-		of memory mapped region.
-	-interrupts:
-		interrupt combiner values.
-
-Example:
-	g2d {
-		compatible = "samsung,exynos-g2d-41";
-		reg = <0x10850000 0x1000>;
-		interrupts = <0 91 0>;
-	};