m68knommu: add info about removing mcfserial

Schedule a removal for this driver. Alternative driver is available for
a while now.

Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 36acbcc..62e6eb1 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -976,11 +976,15 @@
 	depends on SERIAL_68328
 
 config SERIAL_COLDFIRE
-	bool "ColdFire serial support"
+	bool "ColdFire serial support (DEPRECATED)"
 	depends on COLDFIRE
 	help
 	  This driver supports the built-in serial ports of the Motorola ColdFire
 	  family of CPUs.
+	  This driver is deprecated because it supports only the old interface
+	  for serial drivers and features like magic keys are not working.
+	  Please switch to the new style driver because this driver will be
+	  removed soon.
 
 config SERIAL_MCF
 	bool "Coldfire serial support (new style driver)"