staging: mei: adding set_timeout watchdog function

add the ability to let the watchdog core set
the AMT watchdog timeout value.

the default value will be only set in the start function.

Signed-off-by: Oren Weil <oren.jer.weil@intel.com>
Acked-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>