Add a kernel 4.6 recipe

Adding a 4.6 kernel recipe for the AST2500.  AST2400 remains on
4.4.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-kernel/linux/linux-obmc_4.6.bb b/common/recipes-kernel/linux/linux-obmc_4.6.bb
new file mode 100644
index 0000000..78bf3b2
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-obmc_4.6.bb
@@ -0,0 +1,5 @@
+KBRANCH ?= "dev-4.6"
+LINUX_VERSION ?= "4.6"
+SRCREV="6bf0b62ef667270f8a8cce46abc6c1f9b68785a5"
+
+require linux-obmc.inc