Arch: Apply hardware re-entrant detection feature

For architecture v8.1 afterwards, hardware re-entrant detection is
provided. Enable this feature on Armv8.1-M later.

Change-Id: Ifde71dc248ebfd8038e6c9f04e0edfbe80644b1d
Signed-off-by: Summer Qin <summer.qin@arm.com>
9 files changed