Fix prefix_macros.sh to handle .svh headers, pic_map_auto.h, and RV_BUILD_AHB_LITE macro

[MainakSil]

Summary

This PR fixes several missing cases in tools/prefix_macros.sh that can lead to naming conflicts when multiple VeeR instances are used in the same design.

Changes

1. Support for additional file types

• Extended file matching to include:

  • .svh
  • .h

• Ensures all relevant SystemVerilog header files are processed.

2. Fix for pic_map_auto.h

• Converts pic_map_auto.h → pic_map_auto.svh
• Ensures it is correctly prefixed via the existing renaming flow
• Updates all corresponding include references
• Avoids double prefixing by performing conversion before final file renaming

3. Handle .svh include files

• Ensures instance-specific headers (e.g. el2_dec_csr_equ_*.svh) are uniquely prefixed
• Updates corresponding `include statements in RTL sources

4. Explicit handling of RV_BUILD_AHB_LITE

• Adds prefixing for this macro to avoid conflicts across multiple instances
• Updates both definition and usage sites (e.g. `ifdef conditions)

Motivation

The current script misses certain headers and macros, which can cause:

• Name collisions across multiple VeeR instances
• Incorrect or conflicting include resolutions during compilation

This PR ensures consistent and complete prefixing across all relevant design artifacts.

Notes

• All transformations are applied before the final file renaming step to preserve the intended script flow
• Changes are minimal and scoped to the prefixing logic only

Testing

• Verified script execution on design sources with .sv, .vh, .svh, and .h files
• Confirmed correct prefixing of headers, macros, and module names
• Ensured no duplicate prefixing occurs for pic_map_auto

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: MainakSil / name: Mainak Sil (7b9c5ed, 80ff112)

[MainakSil]

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