clk: qcom: Add support for setting rates on PLLs

Some PLLs may require changing their rate at runtime. Add support
for these PLLs.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

diff --cc drivers/clk/qcom/clk-pll.c
Simple merge

diff --cc drivers/clk/qcom/clk-pll.h
Simple merge