ARM: dts: qcom: Remove s4/5vs1,2 from RPM pm8941 control

These regulators are controlled by the SPMI regulator driver
instead of the RPM regulator driver in the downstream android
kernel sources. Let's remove them from the DTS here because
they'll never be used by the RPM regulator driver.

Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>