clk: qcom: clock-cpu-8939: Re-org cpu clock code for spm pll management

To support SPM pll management cpu ops are required to be added which needs
re-organization of the code.

SPM child node probe is required for the spm event management to be handled
for the SR2/HF PLL of C0/C1/CCI.

Also make the corresponding device tree changes for the clock name changes
which are added to accommodate the new clock code.

Change-Id: I08e7a7ff367c0ae8ae71f954f2c91858b1e9c386
Signed-off-by: Taniya Das <tdas@codeaurora.org>