igt: fb: Move i915 YUV buffer clearing code to a function

The YUV buffer allocation path for the i915 driver also has some code to
clear a YUV buffer.

As that is going to be useful for all the other drivers, let's move it to
a separate function.

Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

0 files changed, 0 insertions, 0 deletions