Input: add KEY_IMAGES specifically for AL Image Browser

Many media center remotes have buttons intended for jumping straight to
one type of media browser or another -- commonly, images/photos/pictures,
audio/music, television, and movies. At present, remotes with an images
or photos or pictures button use any number of different keycodes which
sort of maybe fit. I've seen at least KEY_MEDIA, KEY_CAMERA,
KEY_GRAPHICSEDITOR and KEY_PRESENTATION. None of those seem quite right.
In my mind, KEY_MEDIA should be something more like a media center
application launcher (and I'd like to standardize on that for things
like the windows media center button on the mce remotes). KEY_CAMERA is
used in a lot of webcams, and typically means "take a picture now".
KEY_GRAPHICSEDITOR implies an editor, not a browser. KEY_PRESENTATION
might be the closest fit here, if you think "photo slide show", but it
may well be more intended for "run application in full-screen
presentation mode" or to launch something like magicpoint, I dunno.
And thus, I'd like to have a KEY_IMAGES, which matches the HID Usage AL
Image Browser, the meaning of which I think is crystal-clear. I believe
AL Audio Browser is already covered by KEY_AUDIO, and AL Movie Browser
by KEY_VIDEO, so I'm also adding appropriate comments next to those
keys.

Signed-off-by: Jarod Wilson <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

include/linux/input.h

···
 #define KEY_DVD			0x185	/* Media Select DVD */
 #define KEY_AUX			0x186
 #define KEY_MP3			0x187
-#define KEY_AUDIO		0x188
-#define KEY_VIDEO		0x189
+#define KEY_AUDIO		0x188	/* AL Audio Browser */
+#define KEY_VIDEO		0x189	/* AL Movie Browser */
 #define KEY_DIRECTORY		0x18a
 #define KEY_LIST		0x18b
 #define KEY_MEMO		0x18c	/* Media Select Messages */
···
 #define KEY_FRAMEFORWARD	0x1b5
 #define KEY_CONTEXT_MENU	0x1b6	/* GenDesc - system context menu */
 #define KEY_MEDIA_REPEAT	0x1b7	/* Consumer - transport control */
-#define KEY_10CHANNELSUP        0x1b8   /* 10 channels up (10+) */
-#define KEY_10CHANNELSDOWN      0x1b9   /* 10 channels down (10-) */
+#define KEY_10CHANNELSUP	0x1b8	/* 10 channels up (10+) */
+#define KEY_10CHANNELSDOWN	0x1b9	/* 10 channels down (10-) */
+#define KEY_IMAGES		0x1ba	/* AL Image Browser */
 
 #define KEY_DEL_EOL		0x1c0
 #define KEY_DEL_EOS		0x1c1