staging: unisys: visorbus: 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: NArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorbus_main.c

@@ -294,7 +294,7 @@ static struct attribute *channel_attrs[] = {
 	NULL
 };
 
-static struct attribute_group channel_attr_grp = {
+static const struct attribute_group channel_attr_grp = {
 	.name = "channel",
 	.attrs = channel_attrs,
 };
@@ -391,7 +391,7 @@ static struct attribute *dev_attrs[] = {
 	NULL
 };
 
-static struct attribute_group dev_attr_grp = {
+static const struct attribute_group dev_attr_grp = {
 	.attrs = dev_attrs,
 };
 

drivers/staging/unisys/visorbus/visorchipset.c

@@ -1138,7 +1138,7 @@ static struct attribute *visorchipset_parahotplug_attrs[] = {
 	NULL
 };
 
-static struct attribute_group visorchipset_parahotplug_group = {
+static const struct attribute_group visorchipset_parahotplug_group = {
 	.name = "parahotplug",
 	.attrs = visorchipset_parahotplug_attrs
 };