arm64: dts: qcom: sc8280xp-x13s: mark s11b regulator as always-on

The s11b supply is used by the wlan module (as well as some of the
pmics) which are not yet fully described in the devicetree.

Mark the regulator as always-on for now.

Fixes: 123b30a ("arm64: dts: qcom: sc8280xp-x13s: enable WiFi controller")
Cc: [email protected]	# 6.2
Signed-off-by: Johan Hovold <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: jhovold

arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts

@@ -377,6 +377,7 @@
 			regulator-min-microvolt = <1272000>;
 			regulator-max-microvolt = <1272000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
+			regulator-always-on;
 		};
 
 		vreg_s12b: smps12 {