misc: apds990x: constify attribute_group structures.

attribute_group are not supposed to change at runtime. All functions
working with attribute_group provided by <linux/sysfs.h> work with
const attribute_group. 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/misc/apds990x.c

@@ -1051,7 +1051,7 @@ static struct attribute *sysfs_attrs_ctrl[] = {
 	NULL
 };
 
-static struct attribute_group apds990x_attribute_group[] = {
+static const struct attribute_group apds990x_attribute_group[] = {
 	{.attrs = sysfs_attrs_ctrl },
 };