freedreno/a6xx: cube image fix

Note that emit_intrinsic_load_image() already swaps a .3d flag with an
.a flag.  I tried doing things the other way around (going back to .3d)
but that didn't work.  And treating cube images as 2d array is also what
blob does, so let's just go with that.

Fixes dEQP-GLES31.functional.image_load_store.cube.load_store.*

Signed-off-by: Rob Clark <robdclark@gmail.com>

src/gallium/drivers/freedreno/a6xx/fd6_image.c

@@ -70,6 +70,10 @@ static void translate_image(struct fd6_image *img, const struct pipe_image_view
 	img->cpp       = rsc->cpp;
 	img->bo        = rsc->bo;
 
+	/* Treat cube textures as 2d-array: */
+	if (img->type == A6XX_TEX_CUBE)
+		img->type = A6XX_TEX_2D;
+
 	if (prsc->target == PIPE_BUFFER) {
 		img->buffer = true;
 		img->offset = pimg->u.buf.offset;