staging: unisys: visorbus: cleanup gotos in parser_init_byte_stream

Clean up the goto in parser_init_byte_stream and make the goto section
the error case.

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