Add Agilex 5 FCS Yocto integration using libfcs

[aidangarske]

Description

• Adds opt in wolfSSL FCS integration for AArch64 targets
• Provides a libfcs recipe for non GSRD builds
• Integrates with the GSRD supplied FCS library without file conflicts
• Handles multilib builds by enabling offload only for AArch64
• Installs wolfCrypt test and benchmark tools into the generated image
• Documents the complete Kas BitBake WIC flash and verification flow
• Validates packaged dependencies and hardware offload on the Agilex 5 board

[Copilot]

Pull request overview

This PR adds an opt-in Yocto integration path for wolfSSL hardware offload on Altera Agilex 5 using the FCS (Secure Device Manager) userspace library, including both a standalone libfcs recipe and integration hooks for GSRD-provided gsrd-intel-fcs-lib.

Changes:

• Adds a libfcs recipe and wolfSSL .bbappend to enable FCS offload on AArch64 targets (with multilib considerations).
• Adds a GSRD-focused .bbappend to provide the unversioned libFCS.so linker name expected by consumers.
• Adds documentation links and a detailed end-to-end Agilex 5 image build/deploy/verification guide.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
recipes-support/README.md	Adds a pointer to the Agilex 5 libfcs integration guide.
recipes-support/libfcs/wolfssl_%.bbappend	Opt-in wolfSSL configure/dependency hooks for FCS offload on AArch64 target builds.
recipes-support/libfcs/libfcs_git.bb	New CMake-based libfcs recipe with install fixups and libFCS.so linker-name handling.
recipes-support/libfcs/gsrd-intel-fcs-lib_%.bbappend	Adds a linker-name symlink for the GSRD-provided runtime library.
recipes-support/libfcs/agilex5/README.md	Full Agilex 5 workflow documentation for building, deploying, and validating offload.
README.md	Updates top-level documentation index to mention libfcs/Agilex 5 SDM support.
conf/layer.conf	Adds an opt-in layer switch (WOLFSSL_ALTERA_FCS) to include libfcs recipes/appends.

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