Input: media/IR - switch to using new keycode interface

Switch the code to use new style of getkeycode and setkeycode
methods to allow retrieving and setting keycodes not only by
their scancodes but also by index.
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

include/media/rc-map.h

@@ -35,7 +35,7 @@ struct ir_scancode_table {
 	unsigned int		len;	/* Used number of entries */
 	unsigned int		alloc;	/* Size of *scan in bytes */
 	u64			ir_type;
-	char			*name;
+	const char		*name;
 	spinlock_t		lock;
 };