msm: camera: cci: Fix logic to update cci clk freq

When multiple frequency slaves running on a same I2C bus,
then there is a chance of overriding I2C bus frequency
even if another I2C operation is running. This could lead
to CCI timeout at driver level. Updated synchronization logic,
to properly update I2C clock frequency, only when no other
I2C operation running.

CRs-Fixed: 2800250
Change-Id: Ia341d7cda118497bf1acea8ea59f7f03124f31c3
Signed-off-by: Anil Kumar Kanakanti <akanakan@codeaurora.org>