Yocto 2.4

Move OpenBMC to Yocto 2.4(rocko)

Tested: Built and verified Witherspoon and Palmetto images
Change-Id: I12057b18610d6fb0e6903c60213690301e9b0c67
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/import-layers/yocto-poky/meta-poky/conf/distro/poky-tiny.conf b/import-layers/yocto-poky/meta-poky/conf/distro/poky-tiny.conf
index 561566e..2032bfd 100644
--- a/import-layers/yocto-poky/meta-poky/conf/distro/poky-tiny.conf
+++ b/import-layers/yocto-poky/meta-poky/conf/distro/poky-tiny.conf
@@ -38,7 +38,7 @@
 # Distro config is evaluated after the machine config, so we have to explicitly
 # set the kernel provider to override a machine config.
 PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-tiny"
-PREFERRED_VERSION_linux-yocto-tiny ?= "4.9%"
+PREFERRED_VERSION_linux-yocto-tiny ?= "4.12%"
 
 # We can use packagegroup-core-boot, but in the future we may need a new packagegroup-core-tiny
 #POKY_DEFAULT_EXTRA_RDEPENDS += "packagegroup-core-boot"