images: microchip-headless-image: add extra packages for sama7g5
images: microchip-headless-image: add extra packages for sama7g5

Sama7g5 headless image requires image processing and benchmarking packages.
Add gstreamer, ffmpeg, bonnie++, etc.

Signed-off-by: Eugen Hristev <0e265aa3318aee4461c7191c8b1cc156efd70e14@microchip.com>
Acked-by: Codrin Ciubotariu <97034fe81dd68ee5e1fa3aa6216f6373b034daef@microchip.com>

linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel