scsi: pmcraid: Remove an unused structure member

Signed-off-by: Bart Van Assche <[e-mail]>
Reviewed-by: Johannes Thumshirn <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Cc: Anil Ravindranath <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/pmcraid.h

···
 	u32 order;
 	u32 num_sg;
 	u32 num_dma_sg;
-	u32 buffer_len;
 	struct scatterlist scatterlist[1];
 };