[SCSI] qla2xxx: Remove unused member (dma_handle) from srb_t structure.

The member is not needed as there's no non-scatter-gather
list I/Os submitted by the upper-layers.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -193,9 +193,6 @@ typedef struct srb {
 
 	uint16_t flags;
 
-	/* Single transfer DMA context */
-	dma_addr_t dma_handle;
-
 	uint32_t request_sense_length;
 	uint8_t *request_sense_ptr;
 } srb_t;