Add 4.7 kernel recipe

Using this kernel tree for Witherspoon until the necessary support
is backported to 4.6 or 4.7 is released.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-kernel/linux/linux-obmc_4.7.bb b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-kernel/linux/linux-obmc_4.7.bb
new file mode 100644
index 0000000..a64e11a
--- /dev/null
+++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-witherspoon/recipes-kernel/linux/linux-obmc_4.7.bb
@@ -0,0 +1,6 @@
+KBRANCH ?= "dev-4.7"
+LINUX_VERSION ?= "4.7"
+SRCREV="05543e532c78185ba82057415f96d13e5f500072"
+KSRC = "git://github.com/shenki/linux;protocol=git;branch=${KBRANCH}"
+
+require common/recipes-kernel/linux/linux-obmc.inc