[media] DocBook media: xmllint fixes

Fixes a large number of xmllint errors.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --cc Documentation/DocBook/media/dvb/dvbproperty.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-diseqc-recv-slave-reply.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-diseqc-send-burst.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-diseqc-send-master-cmd.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-enable-high-lnb-voltage.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-get-info.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-get-property.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-read-status.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-set-frontend-tune-mode.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-set-tone.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/fe-set-voltage.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/frontend.xml
Simple merge

diff --cc Documentation/DocBook/media/dvb/frontend_legacy_api.xml
Simple merge