fix(spid): Window description (Cmd/Addr FIFO)
fix(spid): Window description (Cmd/Addr FIFO)

Revise the size of Cmd/Addr FIFOs in the window description. Also, adds
256B SFDP buffer.

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

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