clk: qcom: Maintain qcom_regmap_list of qcom clks

Providers adds ops for list rate and print reg debug nodes
to print necessary debug information, these nodes
can not be added to clk framework and is moved down to provider level.
Since provider does not have complete knowledge on clks owned
at clk framework, providers can not blindly typecast clks owned
by clk framework to call its list/print ops.
A separate qcom_regmap_list is maintained during qcom clk
registration with clk framework. So as when debug list/print
calls are called, provider have knowledge of qcom clks
and only call respective ops on qcom clks maintained
in clk_regmap_list.

Providers can use this API to know if clk is qcom regmaped clk.

Change-Id: I3e4d8280c8fa0c692f855c0d6659dd14f95008df
Signed-off-by: Vivek Aknurwar <viveka@codeaurora.org>