ACPICA: Update check for setting the ANOBJ_IS_EXTERNAL flag.

The ANOBJ_IS_EXTERNAL flag is only used by an ACPICA utilities - iASL.

No functional change for the Linux kernel should results from applying
this patch, but it helps to reduce source code differences between
the kernel and ACPICA upstream.

[rjw: Subject and changelog]
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpica/nssearch.c

@@ -381,7 +381,8 @@ acpi_ns_search_and_enter(u32 target_name,
 
 	/* Node is an object defined by an External() statement */
 
-	if (flags & ACPI_NS_EXTERNAL) {
+	if (flags & ACPI_NS_EXTERNAL ||
+	    (walk_state && walk_state->opcode == AML_SCOPE_OP)) {
 		new_node->flags |= ANOBJ_IS_EXTERNAL;
 	}
 #endif