Add devicetree entry for CAM_I2C (i2c bus 6)

We have some I2C devices that we are trying to attach to what is normally considered the camera I2C bus (we aren’t getting our information thru that channel). We have added I2C channels to other buses but when we try to do the same thing to i2c6 it doesn’t work. Any ideas?

Have a reference to below link for i2c6, however the cam_i2c should be the i2c2 alias i2c@3180000.