[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_iseries.c b/drivers/char/hvc_iseries.c
index f144a94..ec420fe 100644
--- a/drivers/char/hvc_iseries.c
+++ b/drivers/char/hvc_iseries.c
@@ -575,7 +575,7 @@
 				(num_found >= VTTY_PORTS))
 			break;
 
-		vtermno = get_property(vty, "reg", NULL);
+		vtermno = of_get_property(vty, "reg", NULL);
 		if (!vtermno)
 			continue;