media: platform: rename meson/ge2d/ to amlogic/meson-ge2d/

As the end goal is to have platform drivers split by vendor,
rename meson/ge2d/ to amlogic/meson-ge2d/.

Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>