enum fe_status is documented together with FE_READ_STATUS.

Add xrefs for each entry there. This makes the hyperlinks at
frontend.h to go directly to the right documentation.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Fixes a large number of xmllint errors.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

What's written there about the arguments for this ioctl
is bogus: it doesn't return an enum (or a typedef)
for enum fe_status. Instead, it returns a bitmask with the
values defined by enum fe_status.

Also, the size of the integer returned is not 16 bits, but,
instead, sizeof(fe_status_t), e. g. sizeof(enum), with is
arch-dependent.

This should of course be fixed, but this should be done on
a separate patch.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

for the xml files describing ioctls, use the same nomenclature
as on V4L2: the ioctl name, in lower case, using - instead of _.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Instead of going to the V4L2 open(), use the xref to the
proper place at the frontend ioctls that were already
reformatted.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Move the ioctl and enum fe_status to a separate xml file and
put it into a better format.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>