treewide: handle upstream TEMPLATECONF move

The latest poky commit is requiring us to have all of
our template configs in a subdirectory instead of directly in
the `conf` directory.  Without this we end up with errors during
setup like:

```
Error: TEMPLATECONF value (which is .../openbmc/meta-facebook/meta-bletchley/conf) must point to meta-some-layer/conf/templates/template-name
```

Fix this by moving all of our template files into the 'default'
template subdirectory (following the pattern of poky) and modifying
`setup` as necessary to follow.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iecefde73d55acbb6bc63ae3d68c4311adaf327ae
diff --git a/setup b/setup
index 08ac4f4..5152c59 100755
--- a/setup
+++ b/setup
@@ -62,10 +62,10 @@
             tmpl="meta-phosphor/conf"
         else
             # Skip any machines that don't support meta-phosphor.
-            if [ ! -e "$tmpl/bblayers.conf.sample" ]; then
+            if [ ! -e "$tmpl/templates/default/bblayers.conf.sample" ]; then
                 continue
             fi
-            if ! grep -q "##OEROOT##/meta-phosphor" "$tmpl/bblayers.conf.sample"; then
+            if ! grep -q "##OEROOT##/meta-phosphor" "$tmpl/templates/default/bblayers.conf.sample"; then
                 continue
             fi
         fi
@@ -76,7 +76,7 @@
             if [ "${name}" = "${target}" ]; then
                 echo "Machine ${target} found in ${tmpl%/conf}"
                 mkdir -p "${build_dir}"
-                TEMPLATECONF="${tmpl}" source \
+                TEMPLATECONF="${tmpl}/templates/default" source \
                         oe-init-build-env "${build_dir}"
 
                 if [ "$(cat conf/templateconf.cfg)" = "${tmpl}" ]; then