staging: unisys: refactor parser_init_byteStream

Fix CamelCase names:
parser_init_byteStream => parser_init_byte_stream
isLocal => local
tryAgain => retry

Update references to the changed function name.

Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>