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/conf/machine/qemuarm.conf b/import-layers/yocto-poky/meta/conf/machine/qemuarm.conf
index 6b875e4..c8932dd 100644
--- a/import-layers/yocto-poky/meta/conf/machine/qemuarm.conf
+++ b/import-layers/yocto-poky/meta/conf/machine/qemuarm.conf
@@ -15,6 +15,6 @@
 QB_MACHINE = "-machine versatilepb"
 QB_KERNEL_CMDLINE_APPEND = "console=ttyAMA0,115200 console=tty"
 # Add the 'virtio-rng-pci' device otherwise the guest may run out of entropy
-QB_OPT_APPEND = "-show-cursor -usb -usbdevice tablet -device virtio-rng-pci"
-PREFERRED_VERSION_linux-yocto ??= "4.10%"
+QB_OPT_APPEND = "-show-cursor -usb -device usb-tablet -device virtio-rng-pci"
+PREFERRED_VERSION_linux-yocto ??= "4.12%"
 QB_DTB = "${@base_version_less_or_equal('PREFERRED_VERSION_linux-yocto', '4.7', '', 'zImage-versatile-pb.dtb', d)}"