gpu: host1x: mipi: Constify OF match table

This table is never modified and can therefore reside in read-only
memory.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/host1x/mipi.c

@@ -352,7 +352,7 @@ static const struct tegra_mipi_soc tegra124_mipi_soc = {
 	.hsclkpuos = 0x2,
 };
 
-static struct of_device_id tegra_mipi_of_match[] = {
+static const struct of_device_id tegra_mipi_of_match[] = {
 	{ .compatible = "nvidia,tegra114-mipi", .data = &tegra114_mipi_soc },
 	{ .compatible = "nvidia,tegra124-mipi", .data = &tegra124_mipi_soc },
 	{ },