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
  11800	    368	      0	  12168	   2f88	drivers/net/can/janz-ican3.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
  11864	    304	      0	  12168	   2f88	drivers/net/can/janz-ican3.o

Signed-off-by: Arvind Yadav <redacted>
---
Changes in v2:
              Added cover later.
Changes in v3:
              net-next was closed. Now resubmitting it.

 drivers/net/can/janz-ican3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
index 2ba1a81..12a53c8 100644
--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c

@@ -1875,7 +1875,7 @@ static DEVICE_ATTR(termination, S_IWUSR | S_IRUGO, ican3_sysfs_show_term,
 	NULL,
 };
 
-static struct attribute_group ican3_sysfs_attr_group = {
+static const struct attribute_group ican3_sysfs_attr_group = {
 	.attrs = ican3_sysfs_attrs,
 };
 

-- 
1.9.1