clock-krait: Move clock-krait to drivers/clk/qcom

Architectural changes in the ARM Linux kernel require moving clock-krait
driver to drivers/clk/qcom. Also move its header to include/soc/qcom.

Change-Id: I4c84e01adef6d92bfebae5a8cac5a664d76b11fc
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>