libdvbv5: add support for tables with multiple ts_id and section gaps

libdvbv5: add support for tables with multiple ts_id and section gaps

this restores the logic for reading tables like EIT, where the
ts_id indicates the service and the sections are incremented by 8
for example. an application might wish to read a complete EIT
containing all services. in this case the function dvb_read_sections
can be used with allow_section_gaps set to 1 in the dvb_table_filter
struct.

- make struct dvb_table_filter public
- use more generic void * for tables
- make dvb_read_sections public
- fix continuous parsing when table_length > 0
- fix logging

Signed-off-by: André Roth <neolynx@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>