TFTF: Add ARMv8.5 BTI support in xlat_tables_v2 library

This patch adds BTI-related changes in xlat_tables_v2 library
which fully correspond to those in TF-A source tree.

Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Change-Id: I77f3ae7e9a365406ebb3edd500dbc71d3f07ecad
2 files changed