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/pic32mzdask_defconfig b/configs/pic32mzdask_defconfig
index 050c305..68eee4d 100644
--- a/configs/pic32mzdask_defconfig
+++ b/configs/pic32mzdask_defconfig
@@ -29,6 +29,7 @@
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_EMBED=y
 CONFIG_NET_RANDOM_ETHADDR=y
+# CONFIG_BLK is not set
 CONFIG_CLK=y
 CONFIG_DM_GPIO=y
 CONFIG_DM_MMC=y
@@ -45,4 +46,3 @@
 CONFIG_USB_STORAGE=y
 CONFIG_USE_TINY_PRINTF=y
 CONFIG_CMD_DHRYSTONE=y
-# CONFIG_BLK is not set