mesa: upgrade 21.2.1 -> 21.2.4

mesa: upgrade 21.2.1 -> 21.2.4

Contains 'Make YUV formats we're going to emulate external-only' [1]
was applied in 21.2.4. This fixes red label issues on video for VC4,
Freedreno and others.

Deletes meta/recipes-graphics/mesa/files/without-neon.patch [2]
already in Mesa since 21.2.

Release notes:

* 21.2.2: https://docs.mesa3d.org/relnotes/21.2.2.html
* 21.2.3: https://docs.mesa3d.org/relnotes/21.2.3.html
* 21.2.4: https://docs.mesa3d.org/relnotes/21.2.4.html

[1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13038
[2] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12569

Signed-off-by: Pablo Saavedra <psaavedra@igalia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>