[SCSI] arcmsr: fix write to device check

Use command->sc_data_direction instead of trying (incorrectly) to
figure it out from the command itself

[jejb: fix up compile failure]
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: NickCheng <nick.cheng@areca.com.tw>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/arcmsr/arcmsr_hba.c

@@ -1171,9 +1171,8 @@ static int arcmsr_build_ccb(struct AdapterControlBlock *acb,
 	arcmsr_cdb->msgPages = arccdbsize/0x100 + (arccdbsize % 0x100 ? 1 : 0);
 	if ( arccdbsize > 256)
 		arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_SGL_BSIZE;
-	if (pcmd->cmnd[0]|WRITE_6 || pcmd->cmnd[0]|WRITE_10 || pcmd->cmnd[0]|WRITE_12 ){
+	if (pcmd->sc_data_direction == DMA_TO_DEVICE)
 		arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_WRITE;
-	}
 	ccb->arc_cdb_size = arccdbsize;
 	return SUCCESS;
 }