[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/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c
index 08e237c..c43b66a 100644
--- a/drivers/usb/host/ohci-ppc-of.c
+++ b/drivers/usb/host/ohci-ppc-of.c
@@ -97,8 +97,8 @@
 		return -ENODEV;
 
 	is_bigendian =
-		device_is_compatible(dn, "ohci-bigendian") ||
-		device_is_compatible(dn, "ohci-be");
+		of_device_is_compatible(dn, "ohci-bigendian") ||
+		of_device_is_compatible(dn, "ohci-be");
 
 	dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");