EDAC: Constify of_device_id array

of_device_id is always used as const. See driver.of_match_table and open
firmware functions.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: Robert Richter <rric@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Johannes Thumshirn <johannes.thumshirn@men.de>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
Cc: linux-edac@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1426535685-25996-10-git-send-email-fabf@skynet.be
Signed-off-by: Borislav Petkov <bp@suse.de>

drivers/edac/highbank_mc_edac.c

@@ -146,7 +146,7 @@ static struct hb_mc_settings mw_settings = {
 	.int_offset = MW_DDR_ECC_INT_BASE,
 };
 
-static struct of_device_id hb_ddr_ctrl_of_match[] = {
+static const struct of_device_id hb_ddr_ctrl_of_match[] = {
 	{ .compatible = "calxeda,hb-ddr-ctrl",		.data = &hb_settings },
 	{ .compatible = "calxeda,ecx-2000-ddr-ctrl",	.data = &mw_settings },
 	{},