leds: trigger: ledtrig-cpu: Fix incorrectly documented param 'ledevt'

Fixes the following W=1 kernel build warning(s):

drivers/leds/trigger/ledtrig-cpu.c:52: warning: Function parameter or member 'ledevt' not described in 'ledtrig_cpu'
drivers/leds/trigger/ledtrig-cpu.c:52: warning: Excess function parameter 'evt' description in 'ledtrig_cpu'

Cc: Pavel Machek <[e-mail]>
Cc: Linus Walleij <[e-mail]>
Cc: Bryan Wu <[e-mail]>
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Signed-off-by: Pavel Machek <[e-mail]>

drivers/leds/trigger/ledtrig-cpu.c

···
 
 /**
  * ledtrig_cpu - emit a CPU event as a trigger
- * @evt: CPU event to be emitted
+ * @ledevt: CPU event to be emitted
  *
  * Emit a CPU event on a CPU core, which will trigger a
  * bound LED to turn on or turn off.