to monitor config structure for supported baud rates for a target
and variable stop bits.
* monitor.c (monitor_fetch_register): Store register values in big
endian format on any host.
* monitor.c (monitor_load): check the load type and load the file
accordingly. Default to gr_load_image().
* monitor.c (monitor_load_ascii_srec): Load an ascii file in
srecord format by downloading to the monitor.
* w89k-rom.c, op50n-rom.c: set supported load types.