layer.conf: Update to new release series

Switch styhead -> walnascar post release.

(From meta-yocto rev: 405c62c2b13119aaea0d7c119868cf9bb27654d8)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-poky/conf/layer.conf

@@ -9,7 +9,7 @@ BBFILE_COLLECTIONS += "yocto"
 BBFILE_PATTERN_yocto = "^${LAYERDIR}/"
 BBFILE_PRIORITY_yocto = "5"
 
-LAYERSERIES_COMPAT_yocto = "styhead"
+LAYERSERIES_COMPAT_yocto = "walnascar"
 
 # This should only be incremented on significant changes that will
 # cause compatibility issues with other layers

meta-yocto-bsp/conf/layer.conf

@@ -9,4 +9,4 @@ BBFILE_COLLECTIONS += "yoctobsp"
 BBFILE_PATTERN_yoctobsp = "^${LAYERDIR}/"
 BBFILE_PRIORITY_yoctobsp = "5"
 LAYERVERSION_yoctobsp = "4"
-LAYERSERIES_COMPAT_yoctobsp = "styhead"
+LAYERSERIES_COMPAT_yoctobsp = "walnascar"