docs: ocxl.rst: add it to the uAPI book

The content of this file is user-faced.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>
Acked-by: Andrew Donnellan <[e-mail]>

Documentation/accelerators/ocxl.rst Documentation/userspace-api/accelerators/ocxl.rst

···
-:orphan:
-
 ========================================================
 OpenCAPI (Open Coherent Accelerator Processor Interface)
 ========================================================

Documentation/userspace-api/index.rst

···
    seccomp_filter
    unshare
    spec_ctrl
+   accelerators/ocxl
 
 .. only::  subproject and html
 

MAINTAINERS

···
 F:	drivers/misc/ocxl/
 F:	include/misc/ocxl*
 F:	include/uapi/misc/ocxl.h
-F:	Documentation/accelerators/ocxl.rst
+F:	Documentation/userspace-api/accelerators/ocxl.rst
 
 OMAP AUDIO SUPPORT
 M:	Peter Ujfalusi <[e-mail]>