dt-bindings: phy: g12a-usb2-phy: fix compatible string documentation

The compatible strings in the driver don't have the meson prefix.
Fix this in the documentation and rename the file accordingly.

Fixes: da86d286 ("dt-bindings: phy: meson-g12a-usb2-phy: convert to yaml")
Cc: stable@vger.kernel.org
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/8d960029-e94d-224b-911f-03e5deb47ebc@gmail.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>