[tlul] Allow no error responder for N = 2**k in tlul_socket_1n
[tlul] Allow no error responder for N = 2**k in tlul_socket_1n

Because this changes the width of one of the ports, it's hidden behind
the ExplicitErrs parameter which defaults to no change. A follow-up
commit will turn that parameter off for instantiations that don't
explicitly need it.

Signed-off-by: Rupert Swarbrick <290093e2ad2515ed2f14d749293c8cf8e02ca274@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan