[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/video/offb.c b/drivers/video/offb.c
index 3cf603c..885b428 100644
--- a/drivers/video/offb.c
+++ b/drivers/video/offb.c
@@ -322,8 +322,8 @@
 			    ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
 			par->cmap_data = par->cmap_adr + 1;
 			par->cmap_type = cmap_m64;
-		} else if (dp && (device_is_compatible(dp, "pci1014,b7") ||
-				  device_is_compatible(dp, "pci1014,21c"))) {
+		} else if (dp && (of_device_is_compatible(dp, "pci1014,b7") ||
+				  of_device_is_compatible(dp, "pci1014,21c"))) {
 			par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
 			if (par->cmap_adr)
 				par->cmap_type = cmap_gxt2000;