ASoC: Intel: constify pci_device_id.

pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/atom/sst/sst_pci.c

@@ -181,7 +181,7 @@ static void intel_sst_remove(struct pci_dev *pci)
 }
 
 /* PCI Routines */
-static struct pci_device_id intel_sst_ids[] = {
+static const struct pci_device_id intel_sst_ids[] = {
 	{ PCI_VDEVICE(INTEL, SST_MRFLD_PCI_ID), 0},
 	{ 0, }
 };