Convert CONFIG_DISABLE_CONSOLE to Kconfig

This converts the following to Kconfig:
   CONFIG_DISABLE_CONSOLE

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
diff --git a/common/Kconfig b/common/Kconfig
index be2e1b8..41f27a1 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -259,6 +259,11 @@
 	  The buffer is allocated immediately after the malloc() region is
 	  ready.
 
+config DISABLE_CONSOLE
+	bool "Add functionality to disable console completely"
+	help
+		Disable console (in & out).
+
 config IDENT_STRING
 	string "Board specific string to be added to uboot version string"
 	help
diff --git a/scripts/config_whitelist.txt b/scripts/config_whitelist.txt
index 03e4d28..787a453 100644
--- a/scripts/config_whitelist.txt
+++ b/scripts/config_whitelist.txt
@@ -366,7 +366,6 @@
 CONFIG_DIALOG_POWER
 CONFIG_DIMM_SLOTS_PER_CTLR
 CONFIG_DIRECT_NOR_BOOT
-CONFIG_DISABLE_CONSOLE
 CONFIG_DISCONTIGMEM
 CONFIG_DISCOVER_PHY
 CONFIG_DISPLAY_AER_xxxx