Consolidate of_find_property

The only change here is that a readlock is taken while the property list
is being traversed on Sparc where it was not taken previously.

Also, Sparc uses strcasecmp to compare property names while PowerPC
uses strcmp.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: David S. Miller <davem@davemloft.net>

arch/powerpc/kernel/prom.c

@@ -80,10 +80,7 @@ struct boot_param_header *initial_boot_params;
 
 static struct device_node *allnodes = NULL;
 
-/* use when traversing tree through the allnext, child, sibling,
- * or parent members of struct device_node.
- */
-static DEFINE_RWLOCK(devtree_lock);
+extern rwlock_t devtree_lock;	/* temporary while merging */
 
 /* export that to outside world */
 struct device_node *of_chosen;
@@ -1489,25 +1486,6 @@ static int __init prom_reconfig_setup(void)
 __initcall(prom_reconfig_setup);
 #endif
 
-struct property *of_find_property(const struct device_node *np,
-				  const char *name,
-				  int *lenp)
-{
-	struct property *pp;
-
-	read_lock(&devtree_lock);
-	for (pp = np->properties; pp != 0; pp = pp->next)
-		if (strcmp(pp->name, name) == 0) {
-			if (lenp != 0)
-				*lenp = pp->length;
-			break;
-		}
-	read_unlock(&devtree_lock);
-
-	return pp;
-}
-EXPORT_SYMBOL(of_find_property);
-
 /*
  * Add a property to a node
  */