staging: unisys: visorchipset: Shorten parser_init_byte_stream.

Shorten the name of the function parser_init_byte_stream to just
parser_init_stream.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>