dmaengine: ptdma: Remove dead code from pt_dmaengine_register()

devm_kasprintf() is used to allocate and format a string and the
returned pointer is assigned to 'cmd_cache_name'. However, the variable
'cmd_cache_name' is not effectively used.

Remove the dead code.

Signed-off-by: Eder Zulian <[e-mail]>
Reviewed-by: Nathan Lynch <[e-mail]>
Acked-by: Basavaraj Natikar <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/amd/ptdma/ptdma-dmaengine.c

···
 	struct ae4_device *ae4 = NULL;
 	struct pt_dma_chan *chan;
 	char *desc_cache_name;
-	char *cmd_cache_name;
 	int ret, i;
 
 	if (pt->ver == AE4_DMA_VERSION)
···
 					       GFP_KERNEL);
 
 	if (!pt->pt_dma_chan)
-		return -ENOMEM;
-
-	cmd_cache_name = devm_kasprintf(pt->dev, GFP_KERNEL,
-					"%s-dmaengine-cmd-cache",
-					dev_name(pt->dev));
-	if (!cmd_cache_name)
 		return -ENOMEM;
 
 	desc_cache_name = devm_kasprintf(pt->dev, GFP_KERNEL,