[PATCH 05/19] drm/vc4: Use the alpha format helper

[Eric Anholt]

Maxime Ripard <maxime.ripard at free-electrons.com> writes:

> Now that the core has a drm format helper to tell if a format embeds an
> alpha component in it, let's use it.
>
> Cc: Eric Anholt <eric at anholt.net>
> Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>

Reviewed-by: Eric Anholt <eric at anholt.net>
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