arm64: dts: rockchip: switch px30-engicam to enable-gpios

The recommended name for enable GPIOs property in regulator-gpio is
enable-gpios.  This is also required by bindings:

  px30-engicam-px30-core-ctouch2.dtb: vcc3v3-btreg: Unevaluated properties are not allowed ('enable-gpio' was unexpected)

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230725142616.157405-2-krzysztof.kozlowski@linaro.org


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