[media] DocBook: better document FE_SET_TONE ioctl
authorMauro Carvalho Chehab <mchehab@osg.samsung.com>
Wed, 27 May 2015 10:15:50 +0000 (07:15 -0300)
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>
Sat, 30 May 2015 12:35:51 +0000 (09:35 -0300)
Use the proper format for FE_SET_TONE documentation and
improve the documentation.

Keep the enum fe_sec_tone_mode description together with
the ioctl, as both are used together.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

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