coresight: Changes for v6.1
Coresight trace subsystem updates for v6.1 includes:
- Support for HiSilicon PTT trace
- Coresight cleanup of sysfs accessor functions, reduced
code size.
- Expose coresight timestamp source for ETMv4+
- DT binding updates to include missing properties
- Minor documentation, Kconfig text fixes.
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>