ASoC: tegra: constify snd_soc_ops structures

Check for snd_soc_ops structures that are only stored in the ops field of a
snd_soc_dai_link structure.  This field is declared const, so snd_soc_ops
structures that have this property can be declared as const also.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

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

@ok1@
identifier r.i;
struct snd_soc_dai_link e;
position p;
@@
e.ops = &i@p;

@ok2@
identifier r.i, e;
position p;
@@
struct snd_soc_dai_link e[] = { ..., { .ops = &i@p, }, ..., };

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

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

The effect on the layout of the .o files is shown by the following output of
the size command, first before then after the transformation:

  text    data     bss     dec     hex filename
   3143    1888     384    5415    1527 sound/soc/tegra/tegra_alc5632.o
   3191    1840     384    5415    1527 sound/soc/tegra/tegra_alc5632.o

   text    data     bss     dec     hex filename
   3672    2176     768    6616    19d8 sound/soc/tegra/tegra_max98090.o
   3720    2128     768    6616    19d8 sound/soc/tegra/tegra_max98090.o

   text    data     bss     dec     hex filename
   2770    1856     384    5010    1392 sound/soc/tegra/tegra_rt5640.o
   2818    1808     384    5010    1392 sound/soc/tegra/tegra_rt5640.o

   text    data     bss     dec     hex filename
   4412    2176     768    7356    1cbc sound/soc/tegra/tegra_rt5677.o
   4460    2128     768    7356    1cbc sound/soc/tegra/tegra_rt5677.o

   text    data     bss     dec     hex filename
   2442    1536       0    3978     f8a sound/soc/tegra/tegra_sgtl5000.o
   2490    1480       0    3970     f82 sound/soc/tegra/tegra_sgtl5000.o

   text    data     bss     dec     hex filename
   2105    1536       0    3641     e39 sound/soc/tegra/tegra_wm8753.o
   2153    1480       0    3633     e31 sound/soc/tegra/tegra_wm8753.o

   text    data     bss     dec     hex filename
   3755    1888     768    6411    190b sound/soc/tegra/tegra_wm8903.o
   3803    1840     768    6411    190b sound/soc/tegra/tegra_wm8903.o

   text    data     bss     dec     hex filename
   2121    1536       0    3657     e49 sound/soc/tegra/trimslice.o
   2169    1480       0    3649     e41 sound/soc/tegra/trimslice.o

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>