Yocto 2.3

Move OpenBMC to Yocto 2.3(pyro).

Tested: Built and verified Witherspoon and Palmetto images
Change-Id: I50744030e771f4850afc2a93a10d3507e76d36bc
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Resolves: openbmc/openbmc#2461
diff --git a/import-layers/meta-raspberrypi/conf/machine/include/rpi-default-versions.inc b/import-layers/meta-raspberrypi/conf/machine/include/rpi-default-versions.inc
index e65a4ae..faa6b41 100644
--- a/import-layers/meta-raspberrypi/conf/machine/include/rpi-default-versions.inc
+++ b/import-layers/meta-raspberrypi/conf/machine/include/rpi-default-versions.inc
@@ -1,3 +1,3 @@
 # RaspberryPi BSP default versions
 
-PREFERRED_VERSION_linux-raspberrypi ?= "4.4.%"
+PREFERRED_VERSION_linux-raspberrypi ??= "4.9.%"