[doc] Add a small note about the interconnect
[doc] Add a small note about the interconnect

Add a short summary of top_earlgrey's interconnect topology and the
access latency.

Signed-off-by: Alexander Williams <d0fb8a15e7b6f5e62278a4cf44515038c232186c@google.com>

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