[POWERPC] Rename device_is_compatible to of_device_is_compatible

for consistency with other Open Firmware interfaces (and Sparc).

This is just a straight replacement.

This leaves the compatibility define in place.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/drivers/macintosh/windfarm_smu_controls.c b/drivers/macintosh/windfarm_smu_controls.c
index ff398ad..58c2590 100644
--- a/drivers/macintosh/windfarm_smu_controls.c
+++ b/drivers/macintosh/windfarm_smu_controls.c
@@ -263,7 +263,7 @@
 	/* Look for RPM fans */
 	for (fans = NULL; (fans = of_get_next_child(smu, fans)) != NULL;)
 		if (!strcmp(fans->name, "rpm-fans") ||
-		    device_is_compatible(fans, "smu-rpm-fans"))
+		    of_device_is_compatible(fans, "smu-rpm-fans"))
 			break;
 	for (fan = NULL;
 	     fans && (fan = of_get_next_child(fans, fan)) != NULL;) {