ASoC: rcar: fixup generation checker

Current rcar is using rsnd_is_gen1/gen2() to checking its
IP generation, but it needs data mask.
This patch fixes it up.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

include/sound/rcar_snd.h

@@ -68,6 +68,7 @@ struct rsnd_scu_platform_info {
  *
  * A : generation
  */
+#define RSND_GEN_MASK	(0xF << 0)
 #define RSND_GEN1	(1 << 0) /* fixme */
 #define RSND_GEN2	(2 << 0) /* fixme */
 

sound/soc/sh/rcar/rsnd.h

@@ -220,8 +220,8 @@ int rsnd_gen_path_exit(struct rsnd_priv *priv,
 void __iomem *rsnd_gen_reg_get(struct rsnd_priv *priv,
 			       struct rsnd_mod *mod,
 			       enum rsnd_reg reg);
-#define rsnd_is_gen1(s)		((s)->info->flags & RSND_GEN1)
-#define rsnd_is_gen2(s)		((s)->info->flags & RSND_GEN2)
+#define rsnd_is_gen1(s)		(((s)->info->flags & RSND_GEN_MASK) == RSND_GEN1)
+#define rsnd_is_gen2(s)		(((s)->info->flags & RSND_GEN_MASK) == RSND_GEN2)
 
 /*
  *	R-Car ADG