ALSA: asihpi: More constifications

Apply const prefix to each possible place: the static tables for
formats, parameters, etc.

Just for minor optimization and no functional changes.

Link: https://lore.kernel.org/r/20200105144823.29547-33-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/asihpi/hpimsgx.c

@@ -17,7 +17,7 @@ Extended Message Function With Response Caching
 #include "hpimsgx.h"
 #include "hpidebug.h"
 
-static struct pci_device_id asihpi_pci_tbl[] = {
+static const struct pci_device_id asihpi_pci_tbl[] = {
 #include "hpipcida.h"
 };