kernel: Move to Linux 4.16.8-openpower1

New patches:

 - powerpc/perf: Fix memory allocation for core-imc based on num_possible_cpus()
 - scsi: aacraid: Correct hba_send to include iu_type

The perf fix was included in 4.16.7-openpower2 but not committed to the
Linux kernel tree. It is now correctly included in this release.

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/linux/0001-xhci-Reset-controller-on-xhci-shutdown.patch b/openpower/linux/0001-xhci-Reset-controller-on-xhci-shutdown.patch
index 6ad582b..bca0375 100644
--- a/openpower/linux/0001-xhci-Reset-controller-on-xhci-shutdown.patch
+++ b/openpower/linux/0001-xhci-Reset-controller-on-xhci-shutdown.patch
@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Brian King <brking@linux.vnet.ibm.com>
 Date: Wed, 25 Oct 2017 10:42:59 +1100
-Subject: [PATCH 1/2] xhci: Reset controller on xhci shutdown
+Subject: [PATCH 1/4] xhci: Reset controller on xhci shutdown
 
 Fixes kexec boot. Without a hard reset, some USB chips will fail to
 initialize in a kexec booted kernel.
@@ -14,7 +14,7 @@
  1 file changed, 1 insertion(+)
 
 diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
-index 5d37700ae4b0..27848c3226a4 100644
+index b60a02c50b89..e335b35ff3ba 100644
 --- a/drivers/usb/host/xhci.c
 +++ b/drivers/usb/host/xhci.c
 @@ -717,6 +717,7 @@ static void xhci_shutdown(struct usb_hcd *hcd)