Convert CONFIG_SYS_CONSOLE_IS_IN_ENV and CONFIG_CONSOLE_MUX to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_CONSOLE_IS_IN_ENV
   CONFIG_CONSOLE_MUX

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Re-order, re-migrate]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ls1046aqds_qspi_defconfig b/configs/ls1046aqds_qspi_defconfig
index bdcb2d1..c8a68fa 100644
--- a/configs/ls1046aqds_qspi_defconfig
+++ b/configs/ls1046aqds_qspi_defconfig
@@ -1,6 +1,5 @@
 CONFIG_ARM=y
 CONFIG_TARGET_LS1046AQDS=y
-CONFIG_DM_SPI=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-ls1046a-qds-duart"
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
@@ -27,5 +26,6 @@
 CONFIG_DM=y
 CONFIG_SPI_FLASH=y
 CONFIG_SYS_NS16550=y
+CONFIG_DM_SPI=y
 CONFIG_FSL_DSPI=y
 CONFIG_FSL_QSPI=y