mei: bus: revamp probe and remove functions

Instead of generating device id on the fly during probing we
find the matching id entry on the device id table.
Get bus the module reference counter so it cannot
be unloaded after the driver has bounded to the client
device

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>