kernel: Move to Linux v4.17.11-openpower1

PowerPC fixes:

 KVM: PPC: Check if IOMMU page is contained in the pinned physical page
 powerpc/powernv: Fix save/restore of SPRG3 on entry/exit from stop (idle)

Driver fixes:

 net/mlx5: Adjust clock overflow work period
 net/mlx5e: Fix quota counting in aRFS expire flow
 net/mlx5e: Don't allow aRFS for encapsulated packets
 net/mlx5e: Refine ets validation function
 net/mlx5e: Only allow offloading decap egress (egdev) flows
 net/mlx5e: Add ingress/egress indication for offloaded TC flows
 net/mlx5: E-Switch, UBSAN fix undefined behavior in mlx5_eswitch_mode
 net/mlx4_core: Save the qpn from the input modifier in RST2INIT wrapper
 net/mlx4_en: Don't reuse RX page when XDP is set
 tg3: Add higher cpu clock for 5762.

Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/openpower/configs/openpower_mambo_defconfig b/openpower/configs/openpower_mambo_defconfig
index a5e099b..2a5ed9a 100644
--- a/openpower/configs/openpower_mambo_defconfig
+++ b/openpower/configs/openpower_mambo_defconfig
@@ -11,7 +11,7 @@
 BR2_ROOTFS_POST_BUILD_SCRIPT="../openpower/scripts/fixup-target-var ../openpower/scripts/firmware-whitelist"
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.17.9"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.17.11"
 BR2_LINUX_KERNEL_PATCH="$(BR2_EXTERNAL_OP_BUILD_PATH)/linux"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_OP_BUILD_PATH)/configs/linux/skiroot_defconfig"