arcnet: com20020-pci: constify attribute_group structures.

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

File size before:
   text	   data	    bss	    dec	    hex	filename
   3409	    948	     28	   4385	   1121	drivers/net/arcnet/com20020-pci.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   3473	    884	     28	   4385	   1121	drivers/net/arcnet/com20020-pci.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/arcnet/com20020-pci.c b/drivers/net/arcnet/com20020-pci.c
index 01cab9548785..eb7f76753c9c 100644
--- a/drivers/net/arcnet/com20020-pci.c
+++ b/drivers/net/arcnet/com20020-pci.c
@@ -109,7 +109,7 @@ static struct attribute *com20020_state_attrs[] = {
         NULL,
 };
 
-static struct attribute_group com20020_state_group = {
+static const struct attribute_group com20020_state_group = {
         .name = NULL,
         .attrs = com20020_state_attrs,
 };