Input: max8925_onkey - don't mark comment as kernel-doc

Change the comment to a normal (non-kernel-doc) comment to avoid
these kernel-doc warnings:

max8925_onkey.c:2: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* MAX8925 ONKEY driver
max8925_onkey.c:2: warning: missing initial short description on line:
* MAX8925 ONKEY driver

Fixes: 3734574cac100 ("Input: enable onkey driver of max8925")
Signed-off-by: Randy Dunlap <[e-mail]>
Reported-by: kernel test robot <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/misc/max8925_onkey.c

···
-/**
+/*
  * MAX8925 ONKEY driver
  *
  * Copyright (C) 2009 Marvell International Ltd.