batman-adv: Remove uses of return value of seq_printf
batman-adv: Remove uses of return value of seq_printf

This function is soon going to return void so remove the
return value use.

Convert the return value to test seq_has_overflowed() instead.

Signed-off-by: Joe Perches <16a9a54ddf4259952e3c118c763138e83693d7fd@perches.com>
Acked-by: Antonio Quartulli <a08f08bac39aeae6c9580ade7aa8387b5a0e7428@meshcoding.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs