Bluetooth: hci_conn: Remove alloc from critical section

[ Upstream commit 25ab2db3 ]

This removes the kzalloc memory allocation inside critical section in
create_pa_sync, fixing the following message that appears when the kernel
is compiled with CONFIG_DEBUG_ATOMIC_SLEEP enabled:

BUG: sleeping function called from invalid context at
include/linux/sched/mm.h:321

Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Stable-dep-of: 6d0417e4 ("Bluetooth: hci_conn: Fix not setting conn_timeout for Broadcast Receiver")
Signed-off-by: Sasha Levin <sashal@kernel.org>