dt-bindings: Drop undocumented i.MX iomuxc-gpr bindings in examples

The i.MX iomuxc-gpr bindings are undocumented and a mess. Drop their use
from the examples.

The problem with the binding beyond the just random variations is that
the iomuxc-gpr is not a separate block, but registers within the iomuxc
block containing random leftover controls. As a separate DT node, it
creates nodes with overlapping memory addresses.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220422192121.2592030-1-robh@kernel.org

Documentation/devicetree/bindings/mfd/syscon.yaml

@@ -100,12 +100,4 @@ examples:
         compatible = "allwinner,sun8i-h3-system-controller", "syscon";
         reg = <0x01c00000 0x1000>;
     };
-
-  - |
-    gpr: iomuxc-gpr@20e0000 {
-        compatible = "fsl,imx6q-iomuxc-gpr", "syscon";
-        reg = <0x020e0000 0x38>;
-        hwlocks = <&hwlock1 1>;
-    };
-
 ...

Documentation/devicetree/bindings/mux/reg-mux.yaml

@@ -96,7 +96,6 @@ examples:
 
     #include <dt-bindings/mux/mux.h>
     syscon@1000 {
-        compatible = "fsl,imx7d-iomuxc-gpr", "fsl,imx6q-iomuxc-gpr", "syscon", "simple-mfd";
         reg = <0x1000 0x100>;
 
         mux2: mux-controller {