msm: camera: icp: Dynamic clock bandwidth support

Add support for IPE and BPS dynamic clock
and bandwidth for realtime streams. Add support
to set clock and bandwidth based on user request
for debug purpose. Following command is used to
provide clock rate from user.

echo "clk rate" > /sys/kernel/debug/camera_icp/icp_debug_clk

Change-Id: I9a2cfefc8227190cd79257d948d37127767e50e1
Signed-off-by: Suresh Vankadara <svankada@codeaurora.org>