Release 4.4.21-openpower1

v4.4.21 stable release, which includes a fix for the fix for the NVMe
issue that is important for OpenPower machines.

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/linux/0001-xhci-Use-xhci_pci_remove-for-xhci-device-shutdown.patch b/openpower/linux/0001-xhci-Use-xhci_pci_remove-for-xhci-device-shutdown.patch
index aa93d85..6a0865d 100644
--- a/openpower/linux/0001-xhci-Use-xhci_pci_remove-for-xhci-device-shutdown.patch
+++ b/openpower/linux/0001-xhci-Use-xhci_pci_remove-for-xhci-device-shutdown.patch
@@ -1,4 +1,4 @@
-From 58d04f5b8b12bb8bd9da7f68fb6889e78632b80f Mon Sep 17 00:00:00 2001
+From 8cc1999f23b5a63abde5520b043f04c1cce2160f Mon Sep 17 00:00:00 2001
 From: Thadeu Lima De Souza Cascardo <thadeul@br.ibm.com>
 Date: Tue, 25 Mar 2014 10:45:16 -0400
 Subject: [PATCH 1/9] xhci: Use xhci_pci_remove for xhci device shutdown