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

commit b8838e65 upstream.

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: 123b30a7

 ("arm64: dts: qcom: sc8280xp-x13s: enable WiFi controller")
Cc: stable@vger.kernel.org	# 6.2
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230322113318.17908-2-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>