egl/wayland: Add a fallback when fourcc query isn't supported

When queryImage doesn't support __DRI_IMAGE_ATTRIB_FOURCC wayland clients
will die with a NULL derefence in wl_proxy_add_listener.

Attempt to provide a simple fallback to keep ancient systems working.

Fixes: 6595c699 ("egl/wayland: Remove more surface specifics from
create_wl_buffer")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103519


Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
(cherry picked from commit 0db36caa)

Squashed with:

egl: fix var type

queryImage() takes an `int*`; compiler is warning about the
signed<->unsigned pointer mismatch.

Fixes: 0db36caa "egl/wayland: Add a fallback when fourcc
       query isn't supported"
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Frank Binns <frank.binns@imgtec.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
(cherry picked from commit ca95d7ad)