linux: Release 4.12.8-openpower1

This brings the OpenPower kernel up to the latest stable kernel release.
4.12.8 contains an important fix for Power9 DD2:

  powerpc: Fix /proc/cpuinfo revision for POWER9 DD2

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 4a93f43..d05e4fc 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
@@ -10,10 +10,10 @@
  1 file changed, 1 insertion(+), 1 deletion(-)
 
 diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
-index 1ef622ededfd..77f0f83a869c 100644
+index cefa223f9f08..2f5961b957ea 100644
 --- a/drivers/usb/host/xhci-pci.c
 +++ b/drivers/usb/host/xhci-pci.c
-@@ -494,7 +494,7 @@ static struct pci_driver xhci_pci_driver = {
+@@ -501,7 +501,7 @@ static struct pci_driver xhci_pci_driver = {
  	.remove =	xhci_pci_remove,
  	/* suspend and resume implemented later */