dt/bindings: clk: fsl,plldig: Drop 'bindings' from schema id

Having 'bindings' in here causes a warning when checking the schema.

 Documentation/devicetree/bindings/clock/fsl,plldig.yaml:
 $id: relative path/filename doesn't match actual path or filename
         expected: http://devicetree.org/schemas/clock/fsl,plldig.yaml#

Remove it.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Wen He <wen.he_1@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20200203052507.93215-2-sboyd@kernel.orgAcked-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/clock/fsl,plldig.yaml

 # SPDX-License-Identifier: GPL-2.0
 %YAML 1.2
 ---
-$id: http://devicetree.org/schemas/bindings/clock/fsl,plldig.yaml#
+$id: http://devicetree.org/schemas/clock/fsl,plldig.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title: NXP QorIQ Layerscape LS1028A Display PIXEL Clock Binding