dt-bindings: display/msm/gpu: describe A505 clocks

Descirbe A505 clocks it is using same clocks like A506.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Patchwork: https://patchwork.freedesktop.org/patch/672751/


Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>