libdwfl, aarch64: Demangle return addresses using a PAC mask

Demangle mangled return addresses on AARCH64. The value of the masks is
stored in the struct Dwfl_Thread.

Signed-off-by: German Gomez <german.gomez@arm.com>
[SteveC: remove dwfl_thread_state_aarch64_pauth]
Signed-off-by: Steve Capper <steve.capper@arm.com>
3 files changed