qla4xxx: Fix memory leak in func qla4_84xx_config_acb()

Use correct goto statement to free dma memory in case of
failure in function qla4_84xx_config_acb()

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Christoph Hellwig <hch@lst.de>