Fix word endianness in the data transposer module

[hossein1387]

@wagnersj :
it looks like it's outputting the LSB word first instead of the MSB first which what the MVU's expect. It also seems to be taking the first input word and transposes it to the NUM_WORDS-1 bit position in the output words, whereas I think it should be at the 0th bit position.

[hossein1387]

word write into the local buffer was changed. Consequently, the word out ordering is also changed.