boards/xtensa/esp32s3/esp32s3-devkit|esp32s3-korvo-2/configs/sdmmc/defconfig: defconfig for sdmmc support
Add description for sdmmc support on esp32s3 in the board specific documentation.
Add defconfig for esp32s3-devkit with external adapter and emmc module.
Add defconfig for esp32s3-korvo-2 with SD slot enabled.
Signed-off-by: Yinzhe Wu <Yinzhe.Wu@sony.com>
Reviewed-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Jacky Cao <Jacky.Cao@sony.com>
Tested-by: Yinzhe Wu <Yinzhe.Wu@sony.com>
