ASoC: use of_property_read_bool

Use of_property_read_bool to check for the existence of a property.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e1,e2;
statement S2,S1;
@@
-       if (of_get_property(e1,e2,NULL))
+       if (of_property_read_bool(e1,e2))
        S1 else S2
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/ab8500-codec.c b/sound/soc/codecs/ab8500-codec.c
index 2fc8915..1d4059c 100644
--- a/sound/soc/codecs/ab8500-codec.c
+++ b/sound/soc/codecs/ab8500-codec.c
@@ -2408,28 +2408,28 @@
 {
 	u32 value;
 
-	if (of_get_property(np, "stericsson,amic1-type-single-ended", NULL))
+	if (of_property_read_bool(np, "stericsson,amic1-type-single-ended"))
 		codec->amics.mic1_type = AMIC_TYPE_SINGLE_ENDED;
 	else
 		codec->amics.mic1_type = AMIC_TYPE_DIFFERENTIAL;
 
-	if (of_get_property(np, "stericsson,amic2-type-single-ended", NULL))
+	if (of_property_read_bool(np, "stericsson,amic2-type-single-ended"))
 		codec->amics.mic2_type = AMIC_TYPE_SINGLE_ENDED;
 	else
 		codec->amics.mic2_type = AMIC_TYPE_DIFFERENTIAL;
 
 	/* Has a non-standard Vamic been requested? */
-	if (of_get_property(np, "stericsson,amic1a-bias-vamic2", NULL))
+	if (of_property_read_bool(np, "stericsson,amic1a-bias-vamic2"))
 		codec->amics.mic1a_micbias = AMIC_MICBIAS_VAMIC2;
 	else
 		codec->amics.mic1a_micbias = AMIC_MICBIAS_VAMIC1;
 
-	if (of_get_property(np, "stericsson,amic1b-bias-vamic2", NULL))
+	if (of_property_read_bool(np, "stericsson,amic1b-bias-vamic2"))
 		codec->amics.mic1b_micbias = AMIC_MICBIAS_VAMIC2;
 	else
 		codec->amics.mic1b_micbias = AMIC_MICBIAS_VAMIC1;
 
-	if (of_get_property(np, "stericsson,amic2-bias-vamic1", NULL))
+	if (of_property_read_bool(np, "stericsson,amic2-bias-vamic1"))
 		codec->amics.mic2_micbias = AMIC_MICBIAS_VAMIC1;
 	else
 		codec->amics.mic2_micbias = AMIC_MICBIAS_VAMIC2;