documentation error in doc/uci_softiec_target_v1.0.*

[bvl1999]

In doc/uci_softiec_target_v1.0, the documentation for SOFTIEC_CMD_LOAD_SU is incorrect.
load_su expects both a start and end address (which is ignored by the code in softiec_target.cc), so its interface is identical to SOFTIEC_CMD_SAVE

[WebFritzi]

Also the documentation of the status after sending the command seems to be incorrect. It says "00,OK" or "01,FILE NOT FOUND", which is usually sent as ASCII, but here it is just one byte: 0 for success and 1 for error. This is at least misleading.