[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/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index fcacc88..e0c92bf 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -171,7 +171,7 @@
 				int *lenp);
 #define get_property(a, b, c)	of_get_property((a), (b), (c))
 extern void print_properties(struct device_node *node);
-extern int prom_n_addr_cells(struct device_node* np);
+extern int of_n_addr_cells(struct device_node* np);
 extern int prom_n_size_cells(struct device_node* np);
 extern int prom_n_intr_cells(struct device_node* np);
 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);