clk: qcom: Support to add hardware clocks to of_clk_provider

Currently the hardware clocks are added from each clock controller
individually and are not added to the of_clk_provider. But there could be
clocks which are required by clients to be used. Add the hardware clocks to
the of_clk_provider list.

Change-Id: I9a36a52c77672fba13813656a58f7b8cc14a4c27
Signed-off-by: Taniya Das <tdas@codeaurora.org>