Bump Skiboot-p10 to 4e568bf

Changes since commit 30f754f:

Michael Neuling (3):
      hw/phb4/5: Add is_phb4/5() functions
      hw/phb5 Disable GEN4 lane eq for certain Mellanox cards
      hw/phb5: Change lane eq

Ryan Grimm (3):
      BML ONLY: abort on all chiptod sync fails
      chiptod: remove unneeded print
      DD1 workaround: paranoid chiptod patch

Ryan P Grimm (4):
      Merge pull request #49 from michael-neuling/phb5
      Merge pull request #50 from hegdevasant/topology-fix
      Merge pull request #45 from hegdevasant/fsp-rr
      Merge pull request #46 from hegdevasant/opal-prd

Vasant Hegde (7):
      prd: Fix occ, homer node label search
      Clear suprious interrupt
      hdata: assert if we fail to add xscom nodes
      hdata: P10 xscom address calculation
      hdata: Fix xscom address calculation
      hdata/p10: Enable memory-buffer mmio
      external/xscom-utils: Add P10 chip info

Signed-off-by: Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>

----------------------------------------------------------------

 external/opal-prd/opal-prd.c   |  16 +++++++----
 external/xscom-utils/getscom.c |   7 ++++-
 hdata/fsp.c                    |   2 +-
 hdata/hdata.h                  |   1 +
 hdata/memory.c                 |   9 ++++--
 hdata/spira.c                  |  29 +++++++++++++------
 hdata/spira.h                  |   3 ++
 hw/chiptod.c                   | 126 +++++++++++++++++++++++++++++++++++++++++++++++----------------------------------
 hw/phb4.c                      | 113 ++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------
 hw/psi.c                       |   4 +--
 include/phb4-regs.h            |   3 +-
 include/phb4.h                 |   1 +
 include/psi.h                  |   7 +++++
 13 files changed, 217 insertions(+), 104 deletions(-)
diff --git a/openpower/configs/rainier_defconfig b/openpower/configs/rainier_defconfig
index 80ecbc6..5d9c1fc 100644
--- a/openpower/configs/rainier_defconfig
+++ b/openpower/configs/rainier_defconfig
@@ -26,7 +26,7 @@
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_PACKAGE_SKIBOOT=y
 BR2_SKIBOOT_CUSTOM_VERSION=y
-BR2_SKIBOOT_CUSTOM_VERSION_VALUE="30f754f734146a17d4260bde2827d0f08e503916"
+BR2_SKIBOOT_CUSTOM_VERSION_VALUE="4e568bf15692ec2b26440288aad87e02daeba4b0"
 BR2_SKIBOOT_CUSTOM_GIT=y
 BR2_SKIBOOT_CUSTOM_REPO_URL="git@github.ibm.com:p10/skiboot.git"
 BR2_PACKAGE_BUSYBOX_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL_OP_BUILD_PATH)/configs/busybox.fragment"