kernel: Release Linux v4.4.87-openpower1

Machines were hitting an error with the lpfc driver on shutdown:

 The system is going down NOW!
 Sent SIGTERM to all processes
 Sent SIGKILL to all processes
 Requesting system halt
 [ 1238.613900] sd 0:2:1:0: [sdb] Synchronizing SCSI cache
 [ 1238.687338] sd 0:2:0:0: [sda] Synchronizing SCSI cache
 [ 1271.092630] lpfc 0005:01:00.1: 5:2878 ELS XRI exchange busy wait time: 10 seconds.
 [ 1332.092628] lpfc 0005:01:00.0: 4:2878 ELS XRI exchange busy wait time: 10 seconds.
 [ 1394.112621] lpfc 0004:01:00.1: 3:2878 ELS XRI exchange busy wait time: 10 seconds.
 [ 1455.112619] lpfc 0004:01:00.0: 2:2878 ELS XRI exchange busy wait time: 10 seconds.

The backported commit "lpfc: Fix Device discovery failures during switch
reboot test" resolves this issue.

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/configs/barreleye_defconfig b/openpower/configs/barreleye_defconfig
index 510fea4..ceee725 100644
--- a/openpower/configs/barreleye_defconfig
+++ b/openpower/configs/barreleye_defconfig
@@ -42,7 +42,7 @@
 BR2_ROOTFS_POST_BUILD_SCRIPT="../openpower/scripts/fixup-target-var"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.4.77"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.4.87"
 BR2_KERNEL_HEADERS_4_4=y
 BR2_BINUTILS_VERSION_2_26_X=y
 BR2_LINUX_KERNEL_PATCH="$(BR2_EXTERNAL)/linux"