staging: wlags49_h2: Handle sysfs_create_group return correctly

The function returns 0 on success and non-zero on error. So
correctly record the status so it is freed appropriately.

Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2 files changed