ASoC: fsl: Constify static snd_pcm_hardware

Static 'struct snd_pcm_hardware' is not modified by the driver and its
copy is passed to the core, so it can be made const for increased code
safety.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240429-n-asoc-const-snd-pcm-hardware-v1-2-c6ce60989834@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/imx-pcm-rpmsg.c

@@ -16,7 +16,7 @@
 #include "fsl_rpmsg.h"
 #include "imx-pcm-rpmsg.h"
 
-static struct snd_pcm_hardware imx_rpmsg_pcm_hardware = {
+static const struct snd_pcm_hardware imx_rpmsg_pcm_hardware = {
 	.info = SNDRV_PCM_INFO_INTERLEAVED |
 		SNDRV_PCM_INFO_BLOCK_TRANSFER |
 		SNDRV_PCM_INFO_BATCH |