Update the Ci20's defconfig to enable the JZ4780's NAND driver and therefore access to the UBIFS rootfs. Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/12699/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>