xf86-video-nvidia-legacy: make nvidia-legacy happy with kernel 3.13

packages/x11/driver/xf86-video-nvidia-legacy/patches.upstream/01-kernel-3.13.patch

@@ -0,0 +1,16 @@
+diff --git a/kernel/nv-acpi.c b/kernel/nv-acpi.c
+index b0138cd..756f330 100644
+--- a/kernel/nv-acpi.c
++++ b/kernel/nv-acpi.c
+@@ -303,8 +303,11 @@ static int nv_acpi_remove(struct acpi_device *device, int type)
+ 
+     if (pNvAcpiObject->notify_handler_installed)
+     {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
++/* beginning with 3.13, acpi_remove_notify_handler() waits for events to finish */
+         NV_ACPI_OS_WAIT_EVENTS_COMPLETE();
+ 
++#endif
+         // remove event notifier
+         status = acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, nv_acpi_event);
+     }