Add Qualcomm interconnect, LLCC, EDAC, BWMON, and DMA validation

[Srikanth Muppandam (smuppand)]

Add functional validation coverage for Qualcomm interconnect and memory-subsystem components.

Shared infrastructure

• Add common PASS/FAIL/SKIP result orchestration
• Extend runtime kernel-config lookup
• Add reusable DT, platform-device, ICC provider, and debugfs helpers
• Resolve runtime DT symlinks before traversal
• Keep module lookup output safe for command substitution
• Fix dmesg exclusion patterns beginning with -

New test suites

• Interconnect Provider Validation
• Interconnect Topology Validation
• LLCC Validation
• Qualcomm LLCC EDAC Validation
• Qualcomm BWMON Validation
• DMAEngine Data Integrity Validation

The tests dynamically detect applicable hardware and cleanly skip when optional facilities such as debugfs or dmatest are unavailable.