Bluetooth: Fix size of data for LTK Randomizer

Signed-off-by: Brian Gix <bgix@codeaurora.org>
rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER

When assigning a NULL value to an RCU protected pointer, no barrier
is needed. The rcu_assign_pointer, used to handle that but will soon
change to not handle the special case.

Convert all rcu_assign_pointer of NULL value.

//smpl
@@ expression P; @@

- rcu_assign_pointer(P, NULL)
+ RCU_INIT_POINTER(P, NULL)

// </smpl>

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Conflicts:
	net/8021q/vlan.c
	net/netfilter/nfnetlink.c
net: netfilter: Force no unsafe math optimizations

* GCC optimization causes some weird segmentation fault.

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>