the driver will use only 32-bit accessors to read/write
the device registers.
+ liteuart,<addr>
+ Start an early console on a litex serial port at the
+ specified address. The serial port must already be
+ setup and configured. Options are not yet supported.
+
meson,<addr>
Start an early, polled-mode console on a meson serial
port at the specified address. The serial port must