ACPI: thinkpad-acpi: bump up version to 0.21

rfkill support deserves a new version checkpoint...
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>

Documentation/laptops/thinkpad-acpi.txt

 		     ThinkPad ACPI Extras Driver
 
-                            Version 0.20
-                          April 09th, 2008
+                            Version 0.21
+                           May 29th, 2008
 
                Borislav Deianov <borislav@users.sf.net>
              Henrique de Moraes Holschuh <hmh@hmh.eng.br>

drivers/misc/thinkpad_acpi.c

@@ -21,7 +21,7 @@
  *  02110-1301, USA.
  */
 
-#define TPACPI_VERSION "0.20"
+#define TPACPI_VERSION "0.21"
 #define TPACPI_SYSFS_VERSION 0x020200
 
 /*