coresight: etm4x: constify amba_id

amba_id are not supposed to change at runtime. All functions
working with const amba_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/hwtracing/coresight/coresight-etm4x.c

@@ -1052,7 +1052,7 @@ err_arch_supported:
 	return ret;
 }
 
-static struct amba_id etm4_ids[] = {
+static const struct amba_id etm4_ids[] = {
 	{       /* ETM 4.0 - Cortex-A53  */
 		.id	= 0x000bb95d,
 		.mask	= 0x000fffff,