dt-bindings: arm: fsl: add nxp based toradex apalis/colibri bindings

dt-bindings: arm: fsl: add nxp based toradex apalis/colibri bindings

Document the following NXP SoC based Toradex Apalis and Colibri module
and carrier board devicetree bindings already supported:
- toradex,apalis_imx6q            # Apalis iMX6 Module
- toradex,apalis_imx6q-eval       # Apalis iMX6 Module on Apalisi
				    Evaluation Board
- toradex,apalis_imx6q-ixora      # Apalis iMX6 Module on Ixora
- toradex,apalis_imx6q-ixora-v1.1 # Apalis iMX6 Module on Ixora V1.1

- toradex,colibri_imx6dl          # Colibri iMX6 Module
- toradex,colibri_imx6dl-eval-v3  # Colibri iMX6 Module on Colibri
				    Evaluation Board V3

- toradex,colibri-imx6ull-eval            # Colibri iMX6ULL Module on
					    Colibri Evaluation Board
- toradex,colibri-imx6ull-wifi-eval       # Colibri iMX6ULL Wi-Fi /
					    Bluetooth Module on Colibri
					    Evaluation Board

- toradex,colibri-imx7s           # Colibri iMX7 Solo Module
- toradex,colibri-imx7s-eval-v3   # Colibri iMX7 Solo Module on
				    Colibri Evaluation Board V3

- toradex,colibri-imx7d                   # Colibri iMX7 Dual Module
- toradex,colibri-imx7d-emmc              # Colibri iMX7 Dual 1GB (eMMC)
					    Module
- toradex,colibri-imx7d-emmc-eval-v3      # Colibri iMX7 Dual 1GB (eMMC)
                                            Module on Colibri Evaluation
					    Board V3
- toradex,colibri-imx7d-eval-v3           # Colibri iMX7 Dual Module on
					    Colibri Evaluation Board V3
- toradex,vf500-colibri_vf50              # Colibri VF50 Module
- toradex,vf500-colibri_vf50-on-eval      # Colibri VF50 Module on
					    Colibri Evaluation Board
- toradex,vf610-colibri_vf61              # Colibri VF61 Module
- toradex,vf610-colibri_vf61-on-eval      # Colibri VF61 Module on
					    Colibri Evaluation Board

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>