meta-amd: prep for amd meta layer refactoring

Code refactoring to support CRB's bring-up.

Configuration files "nohost" and "withhost" variants
introduced to support various stages of  bring-up in
AMD CRBs.

Change-Id: Id52ac68edf365e6623bd71992fdd6d9fc8a3adf5
Signed-off-by: Jayanth Othayoth <ojayanth@gmail.com>
diff --git a/meta-amd/conf/machine/include/amd-nohost.inc b/meta-amd/conf/machine/include/amd-nohost.inc
new file mode 100644
index 0000000..a37b5b7
--- /dev/null
+++ b/meta-amd/conf/machine/include/amd-nohost.inc
@@ -0,0 +1,3 @@
+MACHINEOVERRIDES =. "amd-nohost:"
+
+require conf/machine/include/amd.inc