reset upstream subtrees to HEAD

Reset the following subtrees on HEAD:
  poky: 8217b477a1(master)
  meta-xilinx: 64aa3d35ae(master)
  meta-openembedded: 0435c9e193(master)
  meta-raspberrypi: 490a4441ac(master)
  meta-security: cb6d1c85ee(master)

Squashed patches:
  meta-phosphor: drop systemd 239 patches
  meta-phosphor: mrw-api: use correct install path

Change-Id: I268e2646d9174ad305630c6bbd3fbc1a6105f43d
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/poky/meta/conf/machine/include/x86-base.inc b/poky/meta/conf/machine/include/x86-base.inc
index c292792..686f938 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 ??= "4.18%"
+PREFERRED_VERSION_linux-yocto ??= "5.0%"
 
 #
 # XSERVER subcomponents, used to build the XSERVER variable