dt-bindings: arm: rockchip: Correct the descriptions for Pine64 boards

Correct the descriptions of a few Pine64 boards and devices, according
to their official names used on the Pine64 wiki.  This ensures consistency
between the officially used names and the names in the source code.

Cc: Marek Kraus <gamiee@pine64.org>
Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/ec124dab2b1a8776aa39177ecce34babca3a50e2.1713832790.git.dsimic@manjaro.org


Signed-off-by: Heiko Stuebner <heiko@sntech.de>