Re-apply f81b2b9a8abd to the new device-tree import

Revert upstream commit 27c90e5e48d0

It changed the #pinctrl-cells value to be equal to 2 and the macro
that generates the values.
Based on the bindings docs a value of 2 is only acceptable if the no

Revert upstream commit 27c90e5e48d0

It changed the #pinctrl-cells value to be equal to 2 and the macro
that generates the values.
Based on the bindings docs a value of 2 is only acceptable if the node
used pinctrl-single,bits and not pinctrl-single,pins

This allow booting further on the beaglebone black with 5.9 DTS

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Add 'sys/contrib/device-tree/' from commit '5ee353c36d3c9c7f63df7c7671875e73fba70958'

git-subtree-dir: sys/contrib/device-tree
git-subtree-mainline: 94611a838866cba8d7366a3107724af98c75e953
git-subt

Add 'sys/contrib/device-tree/' from commit '5ee353c36d3c9c7f63df7c7671875e73fba70958'

git-subtree-dir: sys/contrib/device-tree
git-subtree-mainline: 94611a838866cba8d7366a3107724af98c75e953
git-subtree-split: 5ee353c36d3c9c7f63df7c7671875e73fba70958

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