clk: qcom: Add support for throttle clocks for clients

Throttle axi clocks for camera, display and video needs to be enabled
before the use cases and disable these once their use case is completed.

Change-Id: I2e2e91f4ce7d6f57bf5ced052af2f283bc301070
Signed-off-by: Taniya Das <tdas@codeaurora.org>