arm64: dts: qcom: sc7180-trogdor-quackingstick: add missing avee-supply

arm64: dts: qcom: sc7180-trogdor-quackingstick: add missing avee-supply

The bindings requires the avee-supply, use the same regulator as
the avdd (positive voltage) which would also provide the negative
voltage by definition.

The fixes:
sc7180-trogdor-quackingstick-r0.dts: panel@0: 'avee-supply' is a required property
	from schema $id: http://devicetree.org/schemas/display/panel/boe,tv101wum-nl6.yaml#

Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20241230-topic-misc-dt-fixes-v4-3-1e6880e9dda3@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>