[PATCH] ARM64: dts: meson-gx: increase default shared CMA pool size

Christian Hewitt [off-list ref] writes:

Devices using the new V4L2 mem2mem vdec require a larger CMA pool. As
nearly all GX* devices are video/media focused and will use it, set a
larger (256MB) default value.

Signed-off-by: Christian Hewitt <redacted>

Applied to v4.20/dt64,

Kevin