Adding to KERNEL_FEATURES causes the kernel tools to try to add the
feature to all kernels, even custom kernels not using the
yocto-kernel-cache. By moving it to KERNEL_FEATURES_INTEL_COMMON, it
will only affect the kernels the layer supplies.

Signed-off-by: California Sullivan <california.l.sullivan@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>