skiboot: Update Skiboot to latest P10 level

Shortlog of changes:

Alistair Popple (2):
      cpufeatures: Enable prefix instruction via [H]FSCR bits
      cpufeatures: Advertise MMA support

 core/cpufeatures.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

Signed-off-by: Klaus Heinrich Kiwi <klaus@linux.vnet.ibm.com>
diff --git a/openpower/configs/rainier_defconfig b/openpower/configs/rainier_defconfig
index 0cf5e0d..0d2b2f2 100644
--- a/openpower/configs/rainier_defconfig
+++ b/openpower/configs/rainier_defconfig
@@ -25,7 +25,7 @@
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_PACKAGE_SKIBOOT=y
 BR2_SKIBOOT_CUSTOM_VERSION=y
-BR2_SKIBOOT_CUSTOM_VERSION_VALUE="1a5e7ba6e8ff10f6982773459616f013e73b59a0"
+BR2_SKIBOOT_CUSTOM_VERSION_VALUE="aa771763adffe9f383ef40ae7d6971ee6ee368f3"
 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"