kernel: Move to Linux 4.13.8-openpower1

Move to v4.13.8 and include another patch from next:
45348de "scsi: aacraid: Fix controller initialization failure"

This fixes a problem with the PM8069 controller used on the p9dsu
platform causing the controller to crash after a reset.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
diff --git a/openpower/linux/0002-powerpc-mce-Move-64-bit-machine-check-code-into-mce..patch b/openpower/linux/0002-powerpc-mce-Move-64-bit-machine-check-code-into-mce..patch
index 6a5783f..e4b9a1a 100644
--- a/openpower/linux/0002-powerpc-mce-Move-64-bit-machine-check-code-into-mce..patch
+++ b/openpower/linux/0002-powerpc-mce-Move-64-bit-machine-check-code-into-mce..patch
@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Michael Ellerman <mpe@ellerman.id.au>
 Date: Wed, 4 Oct 2017 13:42:51 +1100
-Subject: [PATCH 2/4] powerpc/mce: Move 64-bit machine check code into mce.c
+Subject: [PATCH 2/5] powerpc/mce: Move 64-bit machine check code into mce.c
 
 We already have mce.c which is built for 64bit and contains other parts
 of the machine check code, so move these bits in there too.