ipmi: make kcs timeout parameters as module options

ipmi: make kcs timeout parameters as module options

ipmi: make kcs timeout parameters as module options

Orabug: 21219155

For slow or heavily used BMC contollers the default wait timeouts for IBF or OBF
bits in the driver may not be sufficient. This may cause problems during more
complicated oem operatoins on the BMC side.
These timeoutsare changed from hardcoded values in the code into kernel
module parameters. The default values are kept unchanged.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Guangyu Sun <guangyu.sun@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>