Update type table to match ISO/IEC 13818-1:2007(E).

Fmx_rate_length field should not be bigger that 32.

The bits were reversed, now they are where they should be.

For source file is used the output generated by examples/dvb_gen_si.

The descriptors that have loops in them used their own DESCxx_HEADER_SIZE
defines when calculating descriptor length. That works only in cases when
DESCxx_HEADER_SIZE is equal to DESC_HEADER_SIZE. In order to avoid confusion
and bugs use DESC_HEADER_SIZE instead of redefined value.