arm64: dts: qcom: sdm845-xiaomi-polaris: Fix sde_dsi_active pinctrl

"make dtbs_check" says:

    bias-disable: boolean property with value b'\x00\x00\x00\x00'

Fix this by dropping the offending value.

Fixes: be497abe ("arm64: dts: qcom: Add support for Xiaomi Mi Mix2s")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Caleb Connolly <caleb@connolly.tech>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/629afd26008c2b1ba5822799ea7ea5b5271895e8.1660903997.git.geert+renesas@glider.be

arch/arm64/boot/dts/qcom/sdm845-xiaomi-polaris.dts

@@ -617,7 +617,7 @@ sde_dsi_active: sde-dsi-active {
 		pins = "gpio6", "gpio10";
 		function = "gpio";
 		drive-strength = <8>;
-		bias-disable = <0>;
+		bias-disable;
 	};
 
 	sde_dsi_suspend: sde-dsi-suspend {