drivers/net/wireless/ipw2x00/libipw_module.c: remove unnecessary null test before kfree
drivers/net/wireless/ipw2x00/libipw_module.c: remove unnecessary null test before kfree

Fix checkpatch warning:
WARNING: kfree(NULL) is safe this check is probably not required

Cc: Stanislav Yakovlev <76358c7ffcb87f4329af1786354bb891c7ca2301@gmail.com>
Cc: "John W. Linville" <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>
Cc: f74286e6560323ac86a4fee75575f04dd9aa6ad3@vger.kernel.org
Signed-off-by: Fabian Frederick <3efd2a027b14fd890cd23a9ef6d1134b4e5ad850@skynet.be>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

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