staging: unisys: Remove some extraneous start/stop queue operations

If we put them in the enable and disable paths, we don't need them in
several other places

Signed-off-by: Neil Horman <nhorman@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>