Bump Skiboot p10 to 30f754f

This is a significant change for skiboot, since it got rebased with the
latest upstream.

Additionally, there's a change to Unify PHB4/PHB5 drivers

Signed-off-by: Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>
diff --git a/openpower/configs/rainier_defconfig b/openpower/configs/rainier_defconfig
index 6c8ca20..5d88b6f 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="14ca2cff566f1142ba9e8b343ff7a137b105c834"
+BR2_SKIBOOT_CUSTOM_VERSION_VALUE="30f754f734146a17d4260bde2827d0f08e503916"
 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"