device: Constify struct device * parameter to acpi_inject_dsdt

.acpi_inject_dsdt() does not need to modify the device
structure. Hence, this change makes the struct device * parameter to
acpi_inject_dsdt as const.

Change-Id: I3b096d9a5a9d649193e32ea686d5de9f78124997
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40711
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/southbridge/intel/i82801gx/lpc.c

@@ -620,7 +620,7 @@ static void lpc_final(struct device *dev)
 	outb(POST_OS_BOOT, 0x80);
 }
 
-static void southbridge_inject_dsdt(struct device *dev)
+static void southbridge_inject_dsdt(const struct device *dev)
 {
 	global_nvs_t *gnvs = cbmem_add(CBMEM_ID_ACPI_GNVS, sizeof(*gnvs));