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/conf/machine/include/x86-base.inc b/poky/meta/conf/machine/include/x86-base.inc
index ef6690b..a3169b7 100644
--- a/poky/meta/conf/machine/include/x86-base.inc
+++ b/poky/meta/conf/machine/include/x86-base.inc
@@ -18,7 +18,7 @@
 # kernel-related variables
 #
 PREFERRED_PROVIDER_virtual/kernel ??= "linux-yocto"
-PREFERRED_VERSION_linux-yocto ??= "5.10%"
+PREFERRED_VERSION_linux-yocto ??= "5.8%"
 
 #
 # XSERVER subcomponents, used to build the XSERVER variable