coresight-tnoc: add platform driver to support Interconnect TNOC

This patch adds platform driver support for the CoreSight Interconnect
TNOC, Interconnect TNOC is a CoreSight link that forwards trace data
from a subsystem to the Aggregator TNOC. Compared to Aggregator TNOC,
it does not have aggregation and ATID functionality.

Key changes:
- Add platform driver `coresight-itnoc` with device tree match support.
- Refactor probe logic into a common `_tnoc_probe()` function.
- Conditionally initialize ATID only for AMBA-based TNOC blocks.

Signed-off-by: Yuanfang Zhang <yuanfang.zhang@oss.qualcomm.com>
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20251203-itnoc-v5-2-5b97c63f2268@oss.qualcomm.com

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