Convert CONFIG_DISABLE_CONSOLE to Kconfig

This converts the following to Kconfig:
   CONFIG_DISABLE_CONSOLE
Signed-off-by: NChristian Gmeiner <christian.gmeiner@gmail.com>

common/Kconfig

@@ -259,6 +259,11 @@ config CONSOLE_RECORD_IN_SIZE
 	  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

scripts/config_whitelist.txt

@@ -366,7 +366,6 @@ CONFIG_DHCP_MIN_EXT_LEN
 CONFIG_DIALOG_POWER
 CONFIG_DIMM_SLOTS_PER_CTLR
 CONFIG_DIRECT_NOR_BOOT
-CONFIG_DISABLE_CONSOLE
 CONFIG_DISCONTIGMEM
 CONFIG_DISCOVER_PHY
 CONFIG_DISPLAY_AER_xxxx