snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        int err;
-       static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
-       static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
+       static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
+       static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
                .count = ARRAY_SIZE(rates),
                .list = rates,
                .mask = 0,