Lattice support for ad738x_fmc project on LFCPNX-EVN (lfcpnx) carrier board.

[Villyam]

PR Description

• Adding spi_engine_interconnect_ctrl interface to spi_engine IPs.
• projects/common/lfcpnx: Updating base design and IP versions.
• ad738x_fmc/lfcpnx: Adding suport for Lattice LFCPNX-EVN carrier.
• docs/user_guide/build_hdl.rst: Updates for first project.

PR Type

• Bug fix (change that fixes an issue)
• New feature (change that adds new functionality)
• Breaking change (has dependencies in other repos or will cause CI to fail)
• Documentation

PR Checklist

• I have followed the code style guidelines
• I have performed a self-review of changes
• I have compiled all hdl projects and libraries affected by this PR
• I have tested in hardware affected projects, at least on relevant boards
• I have commented my code, at least hard-to-understand parts
• I have signed off all commits from this PR
• I have updated the documentation (wiki pages, ReadMe files, Copyright etc)
• I have not introduced new Warnings/Critical Warnings on compilation
• I have added new hdl testbenches or updated existing ones

[ladace]

Approved, fix Iulia's change requests

[bia1708]

RetriggerCI

[Villyam]

• Updated Copyrights.
• Fixed documentation related request.