crypto: caam - make of_device_ids const.

of_device_ids are not supposed to change at runtime. All functions
working with of_device_ids provided by <linux/of.h> work with const
of_device_ids. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   2376	    808	    128	   3312	    cf0	drivers/crypto/caam/jr.o

File size after constify caam_jr_match:
   text	   data	    bss	    dec	    hex	filename
   2976	    192	    128	   3296	    ce0	drivers/crypto/caam/jr.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/jr.c

@@ -536,7 +536,7 @@ static int caam_jr_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static struct of_device_id caam_jr_match[] = {
+static const struct of_device_id caam_jr_match[] = {
 	{
 		.compatible = "fsl,sec-v4.0-job-ring",
 	},