[rom_ctrl, dv] Fixes regression failure relating to tl accesses
[rom_ctrl, dv] Fixes regression failure relating to tl accesses

There were false failures relating to assertion that checks that all tl
accesses before rom check is done are blocked off.
This commit fixes the assertion by adding an additional check that if
at all d_valid is asserted before the rom check is completed, d_error also
must be asserted.

Signed-off-by: Prajwala Puttappa <d42da9c1e7c0c7ddf8c0244ff16e57febc9395a0@lowrisc.org>

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