bonding: fix error check in sysfs creation

	The existing code did not correctly handle failures to create
the per-interface sysfs group for bonding.

	Modified code to notice errors, and correctly unwind.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
1 file changed