fsl/qe: 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: Scott Wood <oss@buserror.net>

drivers/soc/fsl/qe/qe_tdm.c

@@ -99,7 +99,7 @@ int ucc_of_parse_tdm(struct device_node *np, struct ucc_tdm *utdm,
 	utdm->tdm_port = val;
 	ut_info->uf_info.tdm_num = utdm->tdm_port;
 
-	if (of_get_property(np, "fsl,tdm-internal-loopback", NULL))
+	if (of_property_read_bool(np, "fsl,tdm-internal-loopback"))
 		utdm->tdm_mode = TDM_INTERNAL_LOOPBACK;
 	else
 		utdm->tdm_mode = TDM_NORMAL;