From: Yassine Oudjana <y.oudjana@xxxxxxxxxxxxxx>
The pin controller can function without specifying gpio-ranges so remove
it from required properties. This is also done in preparation for adding
other pin controllers which currently don't have the gpio-ranges property
defined where they are used in DTS. This allows dtbs_check to pass on
those device trees.
Signed-off-by: Yassine Oudjana <y.oudjana@xxxxxxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>