ethtool: fix leakage of defs resources in do_sfeatures

Coverity issue: 1363123
Fixes: 6042804cf6ecc ("Change -k/-K options to use ETHTOOL_{G,S}FEATURES")

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reviewed-by: Greg Rose <grose@lightfleet.com>
1 file changed