[POWERPC] Rename get_property to of_get_property: partial drivers

This does drivers/machintosh and the hvc code.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/char/hvc_vio.c b/drivers/char/hvc_vio.c
index f9c0084..94a542e 100644
--- a/drivers/char/hvc_vio.c
+++ b/drivers/char/hvc_vio.c
@@ -153,7 +153,7 @@
 		if (num_found >= MAX_NR_HVC_CONSOLES)
 			break;
 
-		vtermno = get_property(vty, "reg", NULL);
+		vtermno = of_get_property(vty, "reg", NULL);
 		if (!vtermno)
 			continue;