main: Print register list after initing serial
main: Print register list after initing serial

The serial is in an unknown state at the start, so print the
register list after init.

This will cause some registers to get clobbered.  If we really need
to know the state of the registers early on, we should copy them
to RAM before our init code runs.

Signed-off-by: Sean Cross <dd28e116ed3e781f3ae781acae9fb18383f35c2f@kosagi.com>

urjaman/fernly,pfalcon/fernly,mandl/fernly,xobs/fernly,pfalcon/fernly,xobs/fernly,mandl/fernly,urjaman/fernly,mandl/fernly,urjaman/fernly