dt-bindings: example: Grammar improvements

Improve grammar in recently added sentences:
  - Drop superfluous "be" in front of "have",
  - Add missing articles.

Fixes: 73f76a41c4 ("dt-bindings: example: Extend based on practice")
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200925111429.3146-1-geert+renesas@glider.be
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Geert Uytterhoeven 2020-09-25 13:14:29 +02:00 • committed by Rob Herring
commit 873462adb0