mei: bus: propagate error code returned by mei_me_cl_by_id

no need to change error code value returned by
mei_me_cl_by_id, just propagate it on

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