#old
do_configure_prepend() {
# copy latest defconfig for imx_v7_defoonfig to use
   cp ${S}/arch/arm/configs/imx_v7_defconfig ${S}/.config
    cp ${S}/arch/arm/configs/imx_v7_defconfig ${S}/../defconfig
}
#new
addtask copy_defconfig after do_patch before do_preconfigure
do_copy_defconfig() {
# copy latest defconfig for imx_v7_defoonfig to use
   cp ${S}/arch/arm/configs/imx_v7_defconfig ${S}/.config
   cp ${S}/arch/arm/configs/imx_v7_defconfig ${WORKDIR}/defconfig
   cp ${S}/arch/arm/configs/imx_v7_defconfig ${S}/../defconfig
}