Support building p10 PNOR images

Implements initial experimental support for building P10 PNOR images using
GCC8 (host and cross compiler) as the toolchain

- Introduced rainier configuration files
- Added p10 specific packages for sbe, hcode, hostboot, occ
- Pointed at starting commits for various pacakges to build op-build for p10
- Created various patches to fully compile all packages, to be removed
  when package owners have time to address them
- Generally updated package configurations to support p10 and p10 package
  variants

Signed-off-by: Nick Bofferding <bofferdn@us.ibm.com>
diff --git a/openpower/package/occ-p10/Config.in b/openpower/package/occ-p10/Config.in
new file mode 100644
index 0000000..6a2e284
--- /dev/null
+++ b/openpower/package/occ-p10/Config.in
@@ -0,0 +1,16 @@
+config BR2_PACKAGE_OCC_P10
+        bool "OCC for P10"
+        default y if (BR2_OPENPOWER_PLATFORM && BR2_OPENPOWER_POWER10)
+        select BR2_CPP
+        help
+            Project to build OCC for P10
+
+if BR2_PACKAGE_OCC_P10
+
+config BR2_OCC_P10_BIN_FILENAME
+    string "Name of OCC P10 image file"
+    default "occ.bin"
+    help
+        String used to define name of the OCC binary image file
+
+endif