gistfile1.txt

Target is zynq, therefore: "recipes-kernel/linux/linux-xlnx_4.6.bb" is used,
which includes "linux-xlnx.inc" and "linux-xlnx.inc" includes "linux-xilinx-configs.inc"

My modifications to "linux-xlnx.inc":
KERNEL_FEATURES_append = " \
        bsp/xilinx/soc/linux-xlnx/drivers/xilinx.scc \
        features/net/iptables-foss.scc \
        " 
My modifications to "linux-xilinx-configs.inc"
SRC_URI_append = " \
                file://xilinx-common;type=kmeta;destsuffix=xilinx-common \
                file://xilinx-machine;type=kmeta;destsuffix=xilinx-machine \
                file://foss-common;type=kmeta;destsuffix=foss-common \
                "

Then this is my scc file:
$ cat recipes-kernel/linux/config/foss-common/features/net/iptables-foss.scc
CONFIG_NETFILTER=y
CONFIG_NETFILTER_ADVANCED=y
CONFIG_NF_CONNTRACK=y
......and so on