Reset poky to before our libpam hacks

Things got a bit out of synch with openbmc-config due to the libpam
issues and the migration from the meta-* layers.

Revert the two previous commits and then put the latest poky in with the
libpam revert and get openbmc-config right again.

Revert "Revert "libpam: update 1.3.1 -> 1.5.1""

This reverts commit 87ddd3eab4df68e624b5350ccaab28b3b97547c0.

Revert "poky: subtree update:796be0593a..10c69538c0"

This reverts commit c723b72979bfac6362509cf1fe086900f6641f28.

Change-Id: I3a1f405193aee6a21fe0cd24be9927c143a23d9a
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/poky/meta-poky/conf/distro/poky.conf b/poky/meta-poky/conf/distro/poky.conf
index 623f39d..b33df3c 100644
--- a/poky/meta-poky/conf/distro/poky.conf
+++ b/poky/meta-poky/conf/distro/poky.conf
@@ -19,8 +19,8 @@
 
 DISTRO_FEATURES ?= "${DISTRO_FEATURES_DEFAULT} ${POKY_DEFAULT_DISTRO_FEATURES}"
 
-PREFERRED_VERSION_linux-yocto ?= "5.10%"
-PREFERRED_VERSION_linux-yocto-rt ?= "5.10%"
+PREFERRED_VERSION_linux-yocto ?= "5.8%"
+PREFERRED_VERSION_linux-yocto-rt ?= "5.4%"
 
 SDK_NAME = "${DISTRO}-${TCLIBC}-${SDKMACHINE}-${IMAGE_BASENAME}-${TUNE_PKGARCH}-${MACHINE}"
 SDKPATH = "/opt/${DISTRO}/${SDK_VERSION}"