coresight: tmc: Enable panic sync handling

- Get reserved region from device tree node for metadata
- Define metadata format for TMC
- Add TMC ETR panic sync handler that syncs register snapshot
  to metadata region
- Add TMC ETF panic sync handler that syncs register snapshot
  to metadata region and internal SRAM to reserved trace buffer
  region.

Signed-off-by: Linu Cherian <lcherian@marvell.com>
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250212114918.548431-5-lcherian@marvell.com