meta-ibm: move all meta-witherspoon metadata

The metadata common to all IBM systems is confusingly split between
meta-ibm and meta-witherspoon.  Move everything to meta-ibm.

The meta-ibm README is re-written to more accurately reflect the scope
of the layer.

Allow the configuration samples (bblayers.conf.sample,
local.conf.sample) to be sourced from either meta-ibm or
meta-witherspoon until such a time that any workflows and tooling have
had the opportunity to move to meta-ibm.

(From meta-ibm rev: 6e05ef2e90b214eaf4e43ee7027bbbb1d8d09442)

Change-Id: I3ec890d5300f9649c974ea6b9dca93a2e8a889ab
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-ibm/conf/local.conf.sample b/meta-ibm/conf/local.conf.sample
new file mode 100644
index 0000000..94e76f3
--- /dev/null
+++ b/meta-ibm/conf/local.conf.sample
@@ -0,0 +1,21 @@
+#MACHINE ?= "mihawk"
+#MACHINE ?= "swift"
+#MACHINE ?= "witherspoon-128"
+#MACHINE ?= "rainier"
+MACHINE ??= "witherspoon"
+DISTRO ?= "openbmc-witherspoon"
+PACKAGE_CLASSES ?= "package_rpm"
+SANITY_TESTED_DISTROS_append ?= " *"
+EXTRA_IMAGE_FEATURES = "debug-tweaks"
+USER_CLASSES ?= "buildstats image-mklibs image-prelink"
+PATCHRESOLVE = "noop"
+BB_DISKMON_DIRS = "\
+    STOPTASKS,${TMPDIR},1G,100K \
+    STOPTASKS,${DL_DIR},1G,100K \
+    STOPTASKS,${SSTATE_DIR},1G,100K \
+    STOPTASKS,/tmp,100M,100K \
+    ABORT,${TMPDIR},100M,1K \
+    ABORT,${DL_DIR},100M,1K \
+    ABORT,${SSTATE_DIR},100M,1K \
+    ABORT,/tmp,10M,1K"
+CONF_VERSION = "1"