ASoC: wm_adsp: Improve variable naming

We have wm_adsp_region, wm_adsp_alg_region, and wmfw_region, the
variables for which are all frequently called region, this can get quite
confusing when reviewing the code especially given some functions are
quite long. Consistently use mem for wm_adsp_regions, alg_region for
wm_adsp_alg_region and region for wmfw_region.

Additionally, we use a mix of adsp and dsp for pointers to the wm_adsp
structure standardise this on dsp.

Finally, we use algs to refer to the number of algorithms quite
frequently, change this to the more descriptive n_algs.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/wmfw.h b/sound/soc/codecs/wmfw.h
index ef16336..34c14b5 100644
--- a/sound/soc/codecs/wmfw.h
+++ b/sound/soc/codecs/wmfw.h
@@ -61,7 +61,7 @@
 	struct wmfw_id_hdr fw;
 	__be32 zm;
 	__be32 dm;
-	__be32 algs;
+	__be32 n_algs;
 } __packed;
 
 struct wmfw_adsp2_id_hdr {
@@ -69,7 +69,7 @@
 	__be32 zm;
 	__be32 xm;
 	__be32 ym;
-	__be32 algs;
+	__be32 n_algs;
 } __packed;
 
 struct wmfw_alg_hdr {