dt-bindings: arm: imx: Add i.MXRT compatible Documentation

Recently the imxrt1050 was added but the cpu compatible node wasn't
added. Add both i.MXRT1170 and 1050 compatibles to fsl.yaml.

Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221107071511.2764628-2-Mr.Bossman075@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -1067,6 +1067,18 @@ properties:
               - fsl,imx93-11x11-evk       # i.MX93 11x11 EVK Board
           - const: fsl,imx93
 
+      - description: i.MXRT1050 based Boards
+        items:
+          - enum:
+              - fsl,imxrt1050-evk         # i.MXRT1050 EVK Board
+          - const: fsl,imxrt1050
+
+      - description: i.MXRT1170 based Boards
+        items:
+          - enum:
+              - fsl,imxrt1170-evk         # i.MXRT1170 EVK Board
+          - const: fsl,imxrt1170
+
       - description:
           Freescale Vybrid Platform Device Tree Bindings