arm64: dts: qcom: sm8250: correct LPASS pin pull down

The pull-down property is actually bias-pull-down.

Fixes: 3160c1b8 ("arm64: dts: qcom: sm8250: add lpass lpi pin controller node")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220927153429.55365-4-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/sm8250.dtsi

@@ -2454,7 +2454,7 @@ data {
 					pins = "gpio7";
 					function = "dmic1_data";
 					drive-strength = <2>;
-					pull-down;
+					bias-pull-down;
 					input-enable;
 				};
 			};