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/qemuarmv5.conf b/poky/meta/conf/machine/qemuarmv5.conf
index dfe2a89..7e8c9e1 100644
--- a/poky/meta/conf/machine/qemuarmv5.conf
+++ b/poky/meta/conf/machine/qemuarmv5.conf
@@ -12,9 +12,9 @@
 # For runqemu
 QB_SYSTEM_NAME = "qemu-system-arm"
 QB_MACHINE = "-machine versatilepb"
-QB_KERNEL_CMDLINE_APPEND = "console=ttyAMA0,115200 console=tty vmalloc=256"
+QB_KERNEL_CMDLINE_APPEND = "console=ttyAMA0,115200 console=tty"
 QB_OPT_APPEND = "-usb -device usb-tablet"
-PREFERRED_VERSION_linux-yocto ??= "5.10%"
+PREFERRED_VERSION_linux-yocto ??= "5.8%"
 QB_DTB = "${@oe.utils.version_less_or_equal('PREFERRED_VERSION_linux-yocto', '4.7', '', 'zImage-versatile-pb.dtb', d)}"
 
 KMACHINE_qemuarmv5 = "qemuarm"