Specify the clocks that feed the APCS mux/divider instead of using
default hardcoded values in the source code.

The driver still supports the previous bindings; however with this
update it we allow the msm8916 to access the parent clock names
required by the driver operation using the device tree node.
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20191125142511.681149-2-niklas.cassel@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>