Profiler: Integrate profiling with build split

 - Split NS profiling build with TF-M SPE build
 - Fix typo
 - Update doc

Signed-off-by: Jianliang Shen <jianliang.shen@arm.com>
Change-Id: Idd8c65c1161e43dfb37d59c9693cef943fb9d36d
14 files changed