[dv/top] Fix top_earlgray sanity
[dv/top] Fix top_earlgray sanity

when jtag reset takes longer than system reset, it will block the mem
load and cpu fetches unknown instructions
Signed-off-by: Weicai Yang <4fa8c7762ee4da95e3dee7dae2c3263ea16637f9@google.com>

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