refactor(spid): Rename WrDataFifoSize to WrFifoWidth
refactor(spid): Rename WrDataFifoSize to WrFifoWidth

Renaming a parameter to be consistent with https://github.com/lowRISC/opentitan/pull/14555

Signed-off-by: Eunchan Kim <cb7bc7ceb22698f298c67faa994fd9ddf3cab298@opentitan.org>

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