GCC 14 Adds "GFX90C" For OpenMP Offloading To APUs With GFX9/Vega Graphics

As the last feature patch prior to the GCC 14 compiler code being branched today and GCC 15 opening up on the mainline codebase, AMD GFX90C support was merged for enabling GPU OpenMP device offloading to the numerous AMD SoCs/APUs with the GFX9/Vega graphics...