arm64: dts: qcom: msm8916-pins: remove assignments to bias-disable

Drop assignments to bias-disable as the documentation [1] states that
this property doesn't take a value. Other occurrences of this property
respect that.

[1] Documentation/devicetree/bindings/pinctrl/qcom,msm8916-pinctrl.txt

Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>