PCI: qcom: Drop manual pipe_clk_src handling

PCI: qcom: Drop manual pipe_clk_src handling

Manual reparenting of pipe_clk_src is being replaced with the parking of
the clock with clk_disable()/clk_enable() in the PHY driver. Drop
redundant code switching of the pipe clock between the PHY clock source
and the safe bi_tcxo.

Link: https://lore.kernel.org/r/20220608105238.2973600-6-dmitry.baryshkov@linaro.org
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>