powerpc/macintosh: constify wf_sensor_ops structures

powerpc/macintosh: constify wf_sensor_ops structures

The wf_sensor_ops structures are only stored in the ops field of a
wf_sensor structure, which is declared as const.  Thus the
wf_sensor_ops structures themselves can be const.

Done with the help of Coccinelle.

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct wf_sensor_ops i@p = { ... };

@ok1@
identifier r.i;
struct wf_sensor s;
position p;
@@
s.ops = &i@p

@ok2@
identifier r.i;
struct wf_sat_sensor s;
position p;
@@
s.sens.ops = &i@p

@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
struct wf_sensor_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct wf_sensor_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>