Backport a patch which remove 'needed' in trace_ext4_discard_preallocations
(From OE-Core rev: 88c78fec6daf34d4bf50f788a0adc75e601994da)
Signed-off-by: Yogesh Tyagi <yogesh.tyagi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>