Documentation: move driver-api/dcdbas to userspace-api/

This file documents a sysfs interface that is intended for systems
management software. It does NOT document any kind of kernel driver
API. It is also not meant to be used directly by system administrators
or users.

Cc: Stuart Hayes <[e-mail]>
Cc: [e-mail]
Signed-off-by: Vegard Nossum <[e-mail]>
Acked-by: Hans de Goede <[e-mail]>
Reviewed-by: Randy Dunlap <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/driver-api/index.rst

···
    backlight/lp855x-driver.rst
    connector
    console
-   dcdbas
    eisa
    isa
    io-mapping

Documentation/userspace-api/index.rst

···
    futex2
    tee
    isapnp
+   dcdbas
 
 .. only::  subproject and html
 

MAINTAINERS

···
 M:	Stuart Hayes <[e-mail]>
 L:	[e-mail]
 S:	Maintained
-F:	Documentation/driver-api/dcdbas.rst
+F:	Documentation/userspace-api/dcdbas.rst
 F:	drivers/platform/x86/dell/dcdbas.*
 
 DELL WMI DDV DRIVER

drivers/platform/x86/dell/Kconfig

···
 	  Interrupts (SMIs) and Host Control Actions (system power cycle or
 	  power off after OS shutdown) on certain Dell systems.
 
-	  See <file:Documentation/driver-api/dcdbas.rst> for more details on the driver
+	  See <file:Documentation/userspace-api/dcdbas.rst> for more details on the driver
 	  and the Dell systems on which Dell systems management software makes
 	  use of this driver.
 

drivers/platform/x86/dell/dcdbas.c

···
  *  and Host Control Actions (power cycle or power off after OS shutdown) on
  *  Dell systems.
  *
- *  See Documentation/driver-api/dcdbas.rst for more information.
+ *  See Documentation/userspace-api/dcdbas.rst for more information.
  *
  *  Copyright (C) 1995-2006 Dell Inc.
  */