MIPS: ci20: Enable NAND and UBIFS support in defconfig.

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>

arch/mips/configs/ci20_defconfig

@@ -17,13 +17,12 @@ CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_CGROUPS=y
+CONFIG_MEMCG=y
+CONFIG_CGROUP_SCHED=y
 CONFIG_CGROUP_FREEZER=y
-CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
+CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_MEMCG=y
-CONFIG_MEMCG_KMEM=y
-CONFIG_CGROUP_SCHED=y
 CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
@@ -52,6 +51,11 @@ CONFIG_DEVTMPFS=y
 # CONFIG_ALLOW_DEV_COREDUMP is not set
 CONFIG_DMA_CMA=y
 CONFIG_CMA_SIZE_MBYTES=32
+CONFIG_MTD=y
+CONFIG_MTD_NAND=y
+CONFIG_MTD_NAND_JZ4780=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_FASTMAP=y
 CONFIG_NETDEVICES=y
 # CONFIG_NET_VENDOR_ARC is not set
 # CONFIG_NET_CADENCE is not set
@@ -103,7 +107,7 @@ CONFIG_PROC_KCORE=y
 # CONFIG_PROC_PAGE_MONITOR is not set
 CONFIG_TMPFS=y
 CONFIG_CONFIGFS_FS=y
-# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_UBIFS_FS=y
 # CONFIG_NETWORK_FILESYSTEMS is not set
 CONFIG_NLS=y
 CONFIG_NLS_CODEPAGE_437=y