kernel: Release Linux v4.4.92-openpower1

In particular pick up a fix in the NVMe driver:
6d1400b0 "nvme: protect against simultaneous shutdown invocations"

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
diff --git a/openpower/linux/0004-xhci-do-not-halt-the-secondary-HCD.patch b/openpower/linux/0004-xhci-do-not-halt-the-secondary-HCD.patch
index b0dab4d..4aaf13c 100644
--- a/openpower/linux/0004-xhci-do-not-halt-the-secondary-HCD.patch
+++ b/openpower/linux/0004-xhci-do-not-halt-the-secondary-HCD.patch
@@ -9,6 +9,7 @@
 
 Sined-off-by: Joel Stanley <joel@jms.id.au>
 Signed-off-by: Joel Stanley <joel@jms.id.au>
+Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
 ---
  drivers/usb/host/xhci.c | 20 +++++++++++++++-----
  1 file changed, 15 insertions(+), 5 deletions(-)