dmaengine: cppi: fix build error due to bad variable

Commit 8e3ba95f4190 ("dmaengine: cppi41: use managed functions devm_*()")
moved the code to devm_* but erranously changed a varible name, so fix it.

drivers/dma/cppi41.c:1052:5: error: 'struct cppi41_dd' has no member named 'qmrg_mem'
  cdd->qmrg_mem = devm_ioremap_resource(dev, mem);
     ^
drivers/dma/cppi41.c:1053:16: error: 'struct cppi41_dd' has no member named 'qmrg_mem'
  if (IS_ERR(cdd->qmrg_mem))
                ^
drivers/dma/cppi41.c:1054:21: error: 'struct cppi41_dd' has no member named 'qmrg_mem'
   return PTR_ERR(cdd->qmrg_mem);
                     ^

Fixes: 8e3ba95f4190 ("dmaengine: cppi41: use managed functions devm_*()")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/cppi41.c

@@ -1049,9 +1049,9 @@ static int cppi41_dma_probe(struct platform_device *pdev)
 		return PTR_ERR(cdd->sched_mem);
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-	cdd->qmrg_mem = devm_ioremap_resource(dev, mem);
-	if (IS_ERR(cdd->qmrg_mem))
-		return PTR_ERR(cdd->qmrg_mem);
+	cdd->qmgr_mem = devm_ioremap_resource(dev, mem);
+	if (IS_ERR(cdd->qmgr_mem))
+		return PTR_ERR(cdd->qmgr_mem);
 
 	spin_lock_init(&cdd->lock);
 	INIT_LIST_HEAD(&cdd->pending);