ACPICA: Fix possible memory leak in Unload() operator

The DdbHandle returned by Load() does not have its reference count
decremented during unload, leading to a memory leak. Lin Ming.
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NBob Moore <robert.moore@intel.com>
Signed-off-by: NAndi Kleen <ak@linux.intel.com>

drivers/acpi/executer/exconfig.c

@@ -479,5 +479,8 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
 
 	acpi_tb_set_table_loaded_flag(table_index, FALSE);
 
+	/* Table unloaded, remove a reference to the ddb_handle object */
+
+	acpi_ut_remove_reference(ddb_handle);
 	return_ACPI_STATUS(AE_OK);
 }