mips: mt76xx: gardena-smart-gateway: Misc updates to defconfig

The following changes are made:
- Add default bootcmd which can be used for initial start-up
- Setup necessary MTD parts for Linux compatibility

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
diff --git a/configs/gardena-smart-gateway-mt7688_defconfig b/configs/gardena-smart-gateway-mt7688_defconfig
index bd8b035..a08d1db 100644
--- a/configs/gardena-smart-gateway-mt7688_defconfig
+++ b/configs/gardena-smart-gateway-mt7688_defconfig
@@ -13,6 +13,8 @@
 CONFIG_FIT_SIGNATURE=y
 CONFIG_IMAGE_FORMAT_LEGACY=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
+CONFIG_USE_BOOTCOMMAND=y
+CONFIG_BOOTCOMMAND="cp.b 83000000 84000000 10000 && dhcp uEnv.txt && env import -t ${fileaddr} ${filesize} && run do_u_boot_init; reset"
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_VERSION_VARIABLE=y
 CONFIG_BOARD_EARLY_INIT_F=y
@@ -34,8 +36,8 @@
 CONFIG_CMD_TIME=y
 CONFIG_CMD_UUID=y
 CONFIG_CMD_MTDPARTS=y
-CONFIG_MTDIDS_DEFAULT="spi-nand0=spi-nand0"
-CONFIG_MTDPARTS_DEFAULT="mtdparts=spi-nand0:-(nand)"
+CONFIG_MTDIDS_DEFAULT="spi-nand0=gd5f,nor0=spi0.0"
+CONFIG_MTDPARTS_DEFAULT="spi0.0:640k(uboot),64k(uboot_env0),64k(uboot_env1),64k(factory),-(unused);gd5f:-(nand)"
 CONFIG_CMD_UBI=y
 CONFIG_OF_EMBED=y
 CONFIG_DEFAULT_DEVICE_TREE="gardena-smart-gateway-mt7688"