[spi_device/dv] Update scb as tpm_header_not_empty is a status interrupt
[spi_device/dv] Update scb as tpm_header_not_empty is a status interrupt

Aligned with recent design update #15580
Since tpm_header_not_empty is a status interrupt now, need to clear when it's read out

Signed-off-by: Weicai Yang <4fa8c7762ee4da95e3dee7dae2c3263ea16637f9@google.com>

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