ALSA: isa: make snd_pcm_hardware const

Make these const as they are only used in a copy operation.
Done using Coccinelle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/sb/emu8000_pcm.c

@@ -157,7 +157,7 @@ static int calc_rate_offset(int hz)
 /*
  */
 
-static struct snd_pcm_hardware emu8k_pcm_hw = {
+static const struct snd_pcm_hardware emu8k_pcm_hw = {
 #ifdef USE_NONINTERLEAVE
 	.info =			SNDRV_PCM_INFO_NONINTERLEAVED,
 #else