venus: Exposes VK_EXT_4444_formats extension
Allows venus to passthrough the VK_EXT_4444_formats extension to the vulkan client.
And add code to the device initialization and feature query functions.
Related MR: virgl/virglrenderer!695 (merged)
Signed-off-by: Igor Torrente igor.torrente@collabora.com
Edited by Igor Torrente