arm64: dts: qcom: msm8996: convert xo_board to RPM_SMD_BB_CLK1

Convert all device tree xo_board users to the RPM_SMD_BB_CLK1 clock.
Note, that xo_board can not be removed (yet), as clk-smd-rpm uses
xo_board internally as the parent for all the clocks.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220215201539.3970459-6-dmitry.baryshkov@linaro.org