ACPICA: Update internal namespace node/handle interfaces

This change deletes the unnecessary acpi_ns_convert_entry_to_handle
interface and renames the acpi_ns_map_handle_to_node interface to
acpi_ns_validate_handle.  ACPICA BZ 798.

http://www.acpica.org/bugzilla/show_bug.cgi?id=798

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c
index 0bc807c..5336d91 100644
--- a/drivers/acpi/acpica/evregion.c
+++ b/drivers/acpi/acpica/evregion.c
@@ -718,7 +718,7 @@
 
 	/* Convert and validate the device handle */
 
-	node = acpi_ns_map_handle_to_node(obj_handle);
+	node = acpi_ns_validate_handle(obj_handle);
 	if (!node) {
 		return (AE_BAD_PARAMETER);
 	}
@@ -1087,7 +1087,7 @@
 
 	/* Convert and validate the device handle */
 
-	node = acpi_ns_map_handle_to_node(obj_handle);
+	node = acpi_ns_validate_handle(obj_handle);
 	if (!node) {
 		return (AE_BAD_PARAMETER);
 	}