Bluetooth: Remove need for fiber offload
Bluetooth: Remove need for fiber offload

The bt_recv() function had protections for being called from a
preemptible task context, however nothing was protecting preemption by
ISR. A fairly simple fix is to protect the couple of critical regions
that can be reached from bt_recv() with the help of irq_lock().

Change-Id: Ifc29fd31205eb5425e1b7c862347d9420688df4e
Signed-off-by: Johan Hedberg <628991c7b0a19c384f9b99c21ec330ce952bb838@intel.com>

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