Basic support for Firestone and Garrison systems

Firestone and Garrison are IBM branded OpenPOWER systems.
diff --git a/meta-garrison/recipes-kernel/linux/linux-obmc/garrison.cfg b/meta-garrison/recipes-kernel/linux/linux-obmc/garrison.cfg
new file mode 100644
index 0000000..2594dec
--- /dev/null
+++ b/meta-garrison/recipes-kernel/linux/linux-obmc/garrison.cfg
@@ -0,0 +1,4 @@
+CONFIG_HWMON=y
+CONFIG_SENSORS_NCT7904=y
+CONFIG_EEPROM_AT24=y
+CONFIG_SENSORS_TMP421=y
diff --git a/meta-garrison/recipes-kernel/linux/linux-obmc/garrison.dts b/meta-garrison/recipes-kernel/linux/linux-obmc/garrison.dts
new file mode 100644
index 0000000..3b5e0f1
--- /dev/null
+++ b/meta-garrison/recipes-kernel/linux/linux-obmc/garrison.dts
@@ -0,0 +1 @@
+# use in-tree devtree