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/rock2_defconfig b/configs/rock2_defconfig
index def639f..fa2ed0d 100644
--- a/configs/rock2_defconfig
+++ b/configs/rock2_defconfig
@@ -1,16 +1,16 @@
 CONFIG_ARM=y
 CONFIG_ARCH_ROCKCHIP=y
 CONFIG_SYS_MALLOC_F_LEN=0x2000
+# CONFIG_SPL_MMC_SUPPORT is not set
 CONFIG_ROCKCHIP_RK3288=y
+CONFIG_ROCKCHIP_SPL_BACK_TO_BROM=y
 CONFIG_TARGET_ROCK2=y
 CONFIG_SPL_STACK_R_ADDR=0x80000
 CONFIG_DEFAULT_DEVICE_TREE="rk3288-rock2-square"
-# CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SILENT_CONSOLE=y
+# CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x2000
-# CONFIG_SPL_MMC_SUPPORT is not set
-CONFIG_ROCKCHIP_SPL_BACK_TO_BROM=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMLS is not set
@@ -50,10 +50,8 @@
 CONFIG_DM_PMIC=y
 # CONFIG_SPL_PMIC_CHILDREN is not set
 CONFIG_PMIC_ACT8846=y
-CONFIG_DM_REGULATOR=y
 CONFIG_REGULATOR_ACT8846=y
 CONFIG_DM_REGULATOR_FIXED=y
-CONFIG_DM_PWM=y
 CONFIG_PWM_ROCKCHIP=y
 CONFIG_RAM=y
 CONFIG_SPL_RAM=y