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 <[e-mail]>
Acked-by: Greg Ungerer <[e-mail]>
Acked-by: Alan Cox <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

Documentation/feature-removal-schedule.txt

···
 
 ---------------------------
 
+What:	old style serial driver for ColdFire (CONFIG_SERIAL_COLDFIRE)
+When:	2.6.28
+Why:	This driver still uses the old interface and has been replaced
+	by CONFIG_SERIAL_MCF.
+Who:	Sebastian Siewior <[e-mail]>
+
+---------------------------
+
 What:	/sys/o2cb symlink
 When:	January 2010
 Why:	/sys/fs/o2cb is the proper location for this information - /sys/o2cb

drivers/serial/Kconfig

···
 	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)"

drivers/serial/mcfserial.c

···
+#warning This driver is deprecated. Check Kconfig for details.
 /*
  * mcfserial.c -- serial driver for ColdFire internal UARTS.
  *