dmi: Mark all struct dmi_system_id instances const

... and __initconst if applicable.

Based on similar work for an older kernel in the Grsecurity patch.

[JD: fix toshiba-wmi build]
[JD: add htcpen]
[JD: move __initconst where checkscript wants it]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
diff --git a/drivers/net/ethernet/marvell/skge.c b/drivers/net/ethernet/marvell/skge.c
index 8a835e8..eef35bf 100644
--- a/drivers/net/ethernet/marvell/skge.c
+++ b/drivers/net/ethernet/marvell/skge.c
@@ -4193,7 +4193,7 @@ static struct pci_driver skge_driver = {
 	.driver.pm =	SKGE_PM_OPS,
 };
 
-static struct dmi_system_id skge_32bit_dma_boards[] = {
+static const struct dmi_system_id skge_32bit_dma_boards[] = {
 	{
 		.ident = "Gigabyte nForce boards",
 		.matches = {