Add gaudi2 component for Intel Habana Gaudi2 AI accelerator

[tokey-tahmid]

Pull Request Description

This PR adds a new component for accessing hardware performance counters on Intel Habana Gaudi2 AI accelerator via the SPMU interface. Currently supports 47 native events covering TPC, EDMA, and MME engines with 6 simultaneous hardware counters per SPMU unit.

Implementation

Uses hlthunk_debug() ioctl interface with:

• HL_DEBUG_OP_SET_MODE - Enable debug mode
• HL_DEBUG_OP_SPMU - Configure SPMU event selection
• HL_DEBUG_OP_READBLOCK - Read counter values

File Description

• linux-gaudi2.c - Main component implementation
• gaudi2_events.h - Event definitions and SPMU base addresses
• Rules.gaudi2 - Build configuration
• README.md - Component documentation

Testing

Tested on Voyager machine with Gaudi2 (HL-225)

• All of the following PAPI utilities successfully work with the component:
  • papi_component_avail - ✅
  • papi_avail - ✅
  • papi_native_avail - ✅
  • papi_command_line - ✅
• Successfully instrumented workloads with the gaudi2 component to test the events and counter values:
  • Python example - ✅
  • Custom TPC kernel - ✅

Author Checklist

• Description
  Why this PR exists. Reference all relevant information, including background, issues, test failures, etc
• Commits
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  Commits have a header of the form: module: short description
  Commits have a body (whenever relevant) containing a detailed description of the addressed problem and its solution
• Tests
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