i2c: cadence: Fix the kernel-doc warnings

This fixes the below warnings
drivers/i2c/busses/i2c-cadence.c:164: warning: No description found for parameter 'dev'
drivers/i2c/busses/i2c-cadence.c:826: warning: No description found for parameter 'dev'
drivers/i2c/busses/i2c-cadence.c:826: warning: Excess function parameter '_dev' description in 'cdns_i2c_runtime_suspend'
drivers/i2c/busses/i2c-cadence.c:844: warning: No description found for parameter 'dev'
drivers/i2c/busses/i2c-cadence.c:844: warning: Excess function parameter '_dev' description in 'cdns_i2c_runtime_resume'

while at it also update the cdns_i2c_clear_bus_hold
and the runtime function update.

Tested-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>