Convert CONFIG_CFB_CONSOLE to Kconfig

This converts the following to Kconfig:
   CONFIG_CFB_CONSOLE

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/eb_cpu5282_internal_defconfig b/configs/eb_cpu5282_internal_defconfig
index 7dcbe6c..04d094a 100644
--- a/configs/eb_cpu5282_internal_defconfig
+++ b/configs/eb_cpu5282_internal_defconfig
@@ -11,3 +11,4 @@
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
+# CONFIG_CFB_CONSOLE is not set