ACPI: thinkpad-acpi: bump up version to 0.18

The NVRAM polling support for hot keys is reason enough to
bump up the version string.  Do it.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

Documentation/thinkpad-acpi.txt

 		     ThinkPad ACPI Extras Driver
 
-                            Version 0.17
-                         October 04th, 2007
+                            Version 0.18
+                         October 08th, 2007
 
                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 IBM_VERSION "0.17"
+#define IBM_VERSION "0.18"
 #define TPACPI_SYSFS_VERSION 0x020101
 
 /*