dts: scripts: Require properties to be declared in bindings

Except for a few special properties like 'interrupts' and '#size-cells',
require all devicetree properties on nodes with bindings to be declared
in the binding.

This will help catch misspellings, and makes refactoring and cleanups
safer.

Suggested by Peter A. Bigot.

Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>