yocto-2.1: meta-yocto to meta-poky transition

With yocto-2.1, per meta-yocto/conf/layer.conf, meta-yocto is
deprecated and should be transitioned to meta-poky.

Change-Id: Ie1819c13d1741d68f130570c676b3fe274cbb6f4
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/bblayers.conf.sample b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/bblayers.conf.sample
index 59942f1..55c164a 100644
--- a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/bblayers.conf.sample
+++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/conf/bblayers.conf.sample
@@ -7,7 +7,7 @@
 
 BBLAYERS ?= " \
   ##OEROOT##/meta \
-  ##OEROOT##/meta-yocto \
+  ##OEROOT##/meta-poky \
   ##OEROOT##/meta-phosphor \
   ##OEROOT##/meta-openbmc-bsp/meta-aspeed \
   ##OEROOT##/meta-openbmc-bsp/meta-aspeed/meta-ast2500 \
@@ -17,7 +17,7 @@
   "
 BBLAYERS_NON_REMOVABLE ?= " \
   ##OEROOT##/meta \
-  ##OEROOT##/meta-yocto \
+  ##OEROOT##/meta-poky \
   ##OEROOT##/meta-phosphor \
   ##OEROOT##/meta-openbmc-bsp/meta-aspeed \
   ##OEROOT##/meta-openbmc-bsp/meta-aspeed/meta-ast2500 \