mmc: sdhci-of-esdhc: 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>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-of-esdhc.c

@@ -583,7 +583,7 @@ static int sdhci_esdhc_probe(struct platform_device *pdev)
 
 	np = pdev->dev.of_node;
 
-	if (of_get_property(np, "little-endian", NULL))
+	if (of_property_read_bool(np, "little-endian"))
 		host = sdhci_pltfm_init(pdev, &sdhci_esdhc_le_pdata,
 					sizeof(struct sdhci_esdhc));
 	else