[POWERPC] Rename prom_n_addr_cells to of_n_addr_cells

This is more consistent and gets us closer to the Sparc code.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index 449cf1a..d4fd613 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -136,7 +136,7 @@
 
 	/* Find address list in /platform-open-pic */
 	root = of_find_node_by_path("/");
-	naddr = prom_n_addr_cells(root);
+	naddr = of_n_addr_cells(root);
 	opprop = get_property(root, "platform-open-pic", &opplen);
 	if (!opprop) {
 		printk(KERN_ERR "No platform-open-pic property.\n");