Add a new max_framebuffer_size to devinfo so V3D 4.2 and V3D 7.1 can
expose different framebuffer dimensions: 4096 on RPi4 and 7680 on RPi5.
This is bounded by the maximum clip size supported by the framebuffer.
Take advantage of this to also raise maxImageDimensions* to
max_framebuffer_size.
A non-power-of-two framebuffer means framebuffer_size_for_pixel_count can
compute a height larger than max_framebuffer_size. Clamp the height to the
maximum and recompute the width from the division so w * h <= num_pixels.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/42117>
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