Input: introduce KEY_ASSISTANT

This adds a new keycode to allow users invoke a context-aware desktop
assistant application.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

include/uapi/linux/input-event-codes.h

@@ -600,6 +600,7 @@
 #define KEY_APPSELECT		0x244	/* AL Select Task/Application */
 #define KEY_SCREENSAVER		0x245	/* AL Screen Saver */
 #define KEY_VOICECOMMAND		0x246	/* Listening Voice Command */
+#define KEY_ASSISTANT		0x247	/* AL Context-aware desktop assistant */
 
 #define KEY_BRIGHTNESS_MIN		0x250	/* Set Brightness to Minimum */
 #define KEY_BRIGHTNESS_MAX		0x251	/* Set Brightness to Maximum */