ARM: dts: qcom: apq8064-cm-qs600: pull SDCC pwrseq node up one level

There are no need to add additional simple-bus nodes just to populate
a single pwrseq device. Pull it up one level into /. While we are at it
also fix node name replacing underscore with dash.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220930185236.867655-11-dmitry.baryshkov@linaro.org