To remove features/valleyisland-io/valleyisland-io.scc
includes from valleyisland.scc and valleyisland32.scc.
Instead, this feature should be added to KERNEL_FEATURES in
linux-yocto_3.8.bbappend of meta-valleyisland.

Signed-off-by: Ong, Boon Leong <boon.leong.ong@intel.com>