ASoC: wm_adsp: Use GFP_DMA for algorithm readback

Normally kmalloc() returns things that are DMA safe so not visible on all
platforms but we do need to explicitly request DMA safe memory.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 084ea5f..edb6713 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -553,7 +553,7 @@
 		adsp_warn(dsp, "Algorithm list end %x 0x%x != 0xbeadead\n",
 			  term, be32_to_cpu(val));
 
-	alg = kzalloc((term - pos) * 2, GFP_KERNEL);
+	alg = kzalloc((term - pos) * 2, GFP_KERNEL | GFP_DMA);
 	if (!alg)
 		return -ENOMEM;