Input: add driver for Fujitsu serial touchscreens

These serial touchscreens are found on some Fujitsu lifebook
P-series laptops, and the B6210. Using this requires a new
version of inputattach and doing:

 inputattach -fjt /dev/ttyS0

Big thanks to Stephen Hemminger for testing it and making it
work on his B6210 laptop.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/include/linux/serio.h b/include/linux/serio.h
index d9377ce..9f38250 100644
--- a/include/linux/serio.h
+++ b/include/linux/serio.h
@@ -210,5 +210,6 @@
 #define SERIO_TOUCHRIGHT	0x32
 #define SERIO_TOUCHWIN	0x33
 #define SERIO_TAOSEVM	0x34
+#define SERIO_FUJITSU	0x35
 
 #endif