clk: qcom: rpmh: remove usage of platform name

Now that all clocks have individual names, remove the names of SoCs from
the RPMH clock definitions. Replace it with the common clk_rpmh_ prefix.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221202185843.721673-9-dmitry.baryshkov@linaro.org