Input: atkbd - use ushort instead of uchar keymap

Since some of the keycodes defined in input.h have values greater
than 255 we should use unsigned shorts in keymaps.

Tested-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/include/linux/input.h b/include/linux/input.h
index eff711d..af9c631 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -373,6 +373,8 @@
 
 #define KEY_WIMAX		246
 
+/* Range 248 - 255 is reserved for special needs of AT keyboard driver */
+
 #define BTN_MISC		0x100
 #define BTN_0			0x100
 #define BTN_1			0x101