linux-phytec-fsl

dt-bindings: document common IEEE 802.11 frequency limit property

This new file should be used for properties that apply to all wireless
devices.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>