treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

This changes all DEFINE_TIMER() callbacks to use a struct timer_list
pointer instead of unsigned long. Since the data argument has already been
removed, none of these callbacks are using their argument currently, so
this renames the argument to "unused".

Done using the following semantic patch:

@match_define_timer@
declarer name DEFINE_TIMER;
identifier _timer, _callback;
@@

 DEFINE_TIMER(_timer, _callback);

@change_callback depends on match_define_timer@
identifier match_define_timer._callback;
type _origtype;
identifier _origarg;
@@

 void
-_callback(_origtype _origarg)
+_callback(struct timer_list *unused)
 { ... }

Signed-off-by: Kees Cook <keescook@chromium.org>

arch/m68k/amiga/amisound.c

@@ -65,7 +65,7 @@ void __init amiga_init_sound(void)
 #endif
 }
 
-static void nosound( unsigned long ignored );
+static void nosound(struct timer_list *unused);
 static DEFINE_TIMER(sound_timer, nosound);
 
 void amiga_mksound( unsigned int hz, unsigned int ticks )
@@ -107,7 +107,7 @@ void amiga_mksound( unsigned int hz, unsigned int ticks )
 }
 
 
-static void nosound( unsigned long ignored )
+static void nosound(struct timer_list *unused)
 {
 	/* turn off DMA for audio channel 2 */
 	custom.dmacon = DMAF_AUD2;