ASoC: fsi: 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>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/fsi.c

@@ -1876,7 +1876,7 @@ static void fsi_handler_init(struct fsi_priv *fsi,
 	}
 }
 
-static struct of_device_id fsi_of_match[];
+static const struct of_device_id fsi_of_match[];
 static int fsi_probe(struct platform_device *pdev)
 {
 	struct fsi_master *master;
@@ -2092,7 +2092,7 @@ static struct fsi_core fsi2_core = {
 	.b_mclk	= B_MST_CTLR,
 };
 
-static struct of_device_id fsi_of_match[] = {
+static const struct of_device_id fsi_of_match[] = {
 	{ .compatible = "renesas,sh_fsi",	.data = &fsi1_core},
 	{ .compatible = "renesas,sh_fsi2",	.data = &fsi2_core},
 	{},