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/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index cd6f694..9a939c6 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -8,7 +8,6 @@
 CONFIG_SANDBOX_SPL=y
 CONFIG_PCI=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
-CONFIG_I8042_KEYB=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
 CONFIG_FIT_SIGNATURE=y
@@ -82,7 +81,6 @@
 # CONFIG_SPL_SIMPLE_BUS is not set
 CONFIG_ADC=y
 CONFIG_ADC_SANDBOX=y
-CONFIG_BLK=y
 CONFIG_CLK=y
 CONFIG_CPU=y
 CONFIG_DM_DEMO=y
@@ -99,12 +97,12 @@
 CONFIG_SPL_I2C_MUX=y
 CONFIG_I2C_ARB_GPIO_CHALLENGE=y
 CONFIG_CROS_EC_KEYB=y
+CONFIG_I8042_KEYB=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
 CONFIG_DM_MAILBOX=y
 CONFIG_SANDBOX_MBOX=y
 CONFIG_MISC=y
-CONFIG_CMD_CROS_EC=y
 CONFIG_CROS_EC=y
 CONFIG_CROS_EC_I2C=y
 CONFIG_CROS_EC_LPC=y
@@ -112,7 +110,6 @@
 CONFIG_CROS_EC_SPI=y
 CONFIG_PWRSEQ=y
 CONFIG_SPL_PWRSEQ=y
-CONFIG_DM_MMC_OPS=y
 CONFIG_SANDBOX_MMC=y
 CONFIG_SPI_FLASH_SANDBOX=y
 CONFIG_SPI_FLASH=y