edid-decode: drop dtd_cnt for non-CTA/Block-0 DTDs

The VFPDB in the CTA extensions can refer to DTDs by their index,
but that only applies to DTDs in block 0 and in CTA blocks, the
DTDs in other extension blocks are ignored. So just show them
as "DTD" without a counter.

Signed-off-by: Hans Verkuil <[email protected]>
4 files changed