Fix locking issue in alb MAC address management; removed
incorrect locking and replaced with correct locking.  This bug was
introduced in commit 059fe7a5
("bonding: Convert locks to _bh, rework alb locking for new locking")

	Bug reported by Paul Smith <paul@mad-scientist.net>, who also
tested the fix.
Signed-off-by: NJay Vosburgh <fubar@us.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>