arm64: dts: amlogic: meson-sm1: use correct enable-gpios

Replace enable-gpio by enable-gpios to match the bindings.

Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20230207-b4-amlogic-bindings-fixups-v2-v1-7-93b7e50286e7@linaro.org


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>