Convert CONFIG_SPL_SERIAL_SUPPORT to Kconfig
Move this option to Kconfig and tidy up existing uses.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/ls1021atwr_sdcard_qspi_defconfig b/configs/ls1021atwr_sdcard_qspi_defconfig
index 338ece2..50c75ea 100644
--- a/configs/ls1021atwr_sdcard_qspi_defconfig
+++ b/configs/ls1021atwr_sdcard_qspi_defconfig
@@ -4,6 +4,7 @@
CONFIG_SPL_LIBGENERIC_SUPPORT=y
CONFIG_SPL_I2C_SUPPORT=y
CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_SPL_SERIAL_SUPPORT=y
CONFIG_SPL_ENV_SUPPORT=y
CONFIG_DEFAULT_DEVICE_TREE="ls1021a-twr-duart"
CONFIG_FIT=y