create wl_event_queue in eglCreateWindowSurface() to make it
thread specific

Authored-by: Ajay Kumar Sahoo <[email protected]>

Re-based the code changes for wayland-wsegl v3.1.1.

Signed-off-by: Rajendraprasad K J <[email protected]>

 - drawable->surface->frame_sync & drawable->callback can exists even if
 drawable->window points to NULL
 For eg- in case of resize.
 For the resize case if we avoid destroying the callback then done events
 gets dispatched in freed queue at later point of time.

 - Also for proper cleanup reallocate a new surface in case of resize while
 setting up new window drawable and free up the old one from inside
 WSEGLc_DeleteDrawable.

Signed-off-by: Sunidhi Dixit <[email protected]>

- For throtling the frames use a generic callback holder member
instead of drawable->callback and drawable->surface->frame_sync
to give a chance for the compositor to handle the commit and send
a release event before checking for a free wl_buffer.

Signed-off-by: Sunidhi Dixit <[email protected]>

There is no usecase in which aggressive sync mode
is useful hence removing it. Also with this change
there is no point in keeping drawable->callback.

Signed-off-by: Sunidhi Dixit <[email protected]>

Removed the redundant free_buffer_queue, free_buffer and
free_buffer_unused. Added a new member in struct kms_buffer
i.e. is_free which is true if the buffer is free to be used
or false if the buffer is already been used as back buffer.

Signed-off-by: Sunidhi Dixit <[email protected]>