Bump skiboot to skiboot-5.6.0-64-g700b8962e5fe for POWER9 platforms

Andrew Donnellan (1):
      doc: Fix output of version string when using Sphinx with Python 3

Frederic Barrat (1):
      phb4: Activate shared PCI slot on witherspoon

Oliver O'Halloran (1):
      mambo: Add a reservation for the initramfs

Shilpasri G Bhat (1):
      platform/zz: Acknowledge OCC_LOAD mbox message in ZZ

Stewart Smith (4):
      p8-i2c OCC lock: fix locking in p9_i2c_bus_owner_change
      PCI: only wait 20ms for PHB logic to settle if we detected any PHBs
      Disable nap on P8 Mambo, public release has bugs
      mambo: fix cpio/initramfs reservation

Vasant Hegde (6):
      FSP/RTC: Improve error log
      specfile: Update specfile
      FSP/CONSOLE: Remove __unused attribute from fsp_console_read()
      FSP/CONSOLE: Do not free fsp_msg in error path
      SBE: Add passthrough command support
      opal-prd: Handle SBE passthrough message passing

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
diff --git a/openpower/configs/zz_defconfig b/openpower/configs/zz_defconfig
index d974158..bbe29cb 100644
--- a/openpower/configs/zz_defconfig
+++ b/openpower/configs/zz_defconfig
@@ -52,7 +52,7 @@
 # BR2_PACKAGE_OCC is not set
 # BR2_PACKAGE_CAPP_UCODE is not set
 BR2_SKIBOOT_CUSTOM_VERSION=y
-BR2_SKIBOOT_CUSTOM_VERSION_VALUE="skiboot-5.6.0-50-g05b8834b5a4f"
+BR2_SKIBOOT_CUSTOM_VERSION_VALUE="skiboot-5.6.0-64-g700b8962e5fe"
 BR2_PACKAGE_LOADKEYS=y
 # BR2_PACKAGE_HOST_PPE42_BINUTILS is not set
 # BR2_PACKAGE_HOST_PPE42_GCC is not set