clk: qcom: cpu: Re-org CPU clock driver for SDXLemur

Fix cpu clock driver to remove unused properties and re-org
the code to parse the device tree data as we prepare for
the driver to be shared across multiple cpu clocks.

Change-Id: Id7db6d0a860155f2a213d168385913341a562315
Signed-off-by: Rakesh Kota <kotarake@codeaurora.org>