[U-Boot] doc: Replace DocBook with sphinx-based docs

[York Sun]

On 07/24/2018 05:44 AM, Tom Rini wrote:
> On Tue, Jul 10, 2018 at 08:40:17AM +0200, Mario Six wrote:
> 
>> The Linux kernel moved to sphinx-based documentation and got rid of the
>> DocBook based documentation quite a while ago. Hence, the DocBook
>> documentation for U-Boot should be converted as well.
>>
>> To achieve this, import the necessary files from Linux v4.17, and
>> convert the current DocBook documentation (three files altogether) to
>> sphinx/reStructuredText.
>>
>> For now, all old DocBook documentation was merged into a single
>> handbook, tentatively named "U-Boot Hacker Manual".
>>
>> For some source files, the documentation style was changed to comply
>> with kernel-doc; no functional changes were applied.
>>
>> Signed-off-by: Mario Six <mario.six at gdsys.cc>
> 
> Applied to u-boot/master, thanks!
> 

Does anyone see this error?

$ make distclean
scripts/Makefile.clean:15: doc/DocBook/Makefile: No such file or directory
make[1]: *** No rule to make target 'doc/DocBook/Makefile'.  Stop.
Makefile:1610: recipe for target '_clean_doc/DocBook' failed
make: *** [_clean_doc/DocBook] Error 2

York