[PATCH v2 0/2] fix vendor prefix for arcxcnn driver and bindings

[Brian Dodge]

These v2 patches incorporate the following changes

1/2 dt-bindings: backlight:

The documentation for "arc" has been re-added but marked (deprecated)
to match the actual driver support for that

2/2 backlight: arcxcnn:

Added new-lines and fixed spelling as per feedback

Original patch description:

This patch is to update the arcxcnn backlight driver to use the
proper "arctic" vendor-prefix and document that in the device-
tree bindings.

There is at least one existing device using the old "arc"
vendor-prefix (Samsung Chromebook Plus), so support for that
remains in the driver source.