[ARM] S3C24XX: Documentation: Update GPIO status

Update the status of the S3C24XX GPIO now we have
moved to supporting GPIOLIB
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

Documentation/arm/Samsung-S3C24XX/GPIO.txt

@@ -13,6 +13,21 @@ Introduction
   data-sheet/users manual to find out the complete list.
 
 
+GPIOLIB
+-------
+
+  With the event of the GPIOLIB in drivers/gpio, support for some
+  of the GPIO functions such as reading and writing a pin will
+  be removed in favour of this common access method.
+
+  Once all the extant drivers have been converted, the functions
+  listed below will be removed (they may be marked as __deprecated
+  in the near future).
+
+  - s3c2410_gpio_getpin
+  - s3c2410_gpio_setpin
+
+
 Headers
 -------
 

Documentation/arm/Samsung-S3C24XX/Overview.txt

@@ -206,6 +206,9 @@ GPIO
   The core contains support for manipulating the GPIO, see the
   documentation in GPIO.txt in the same directory as this file.
 
+  Newer kernels carry GPIOLIB, and support is being moved towards
+  this with some of the older support in line to be removed.
+
 
 Clock Management
 ----------------