Yocto 2.4

Move OpenBMC to Yocto 2.4(rocko)

Tested: Built and verified Witherspoon and Palmetto images
Change-Id: I12057b18610d6fb0e6903c60213690301e9b0c67
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/import-layers/yocto-poky/meta-poky/conf/layer.conf b/import-layers/yocto-poky/meta-poky/conf/layer.conf
index 8b7b33d..26d7c3b 100644
--- a/import-layers/yocto-poky/meta-poky/conf/layer.conf
+++ b/import-layers/yocto-poky/meta-poky/conf/layer.conf
@@ -9,6 +9,8 @@
 BBFILE_PATTERN_yocto = "^${LAYERDIR}/"
 BBFILE_PRIORITY_yocto = "5"
 
+LAYERSERIES_COMPAT_yocto = "rocko"
+
 # This should only be incremented on significant changes that will
 # cause compatibility issues with other layers
 LAYERVERSION_yocto = "3"