VMCI: No need to clear memory after a dma_alloc_coherent() call

dma_alloc_coherent() already clear the allocated memory, there is no need
to explicitly call memset().
This saves a few cycles and a few lines of code.
Acked-by: Vishnu Dasa <vdasa@vmware.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/3e8c0bfaa77500e22d6c90f249da1c53dbae716e.1645734041.git.christophe.jaillet@wanadoo.frSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/vmw_vmci/vmci_guest.c

@@ -706,14 +706,12 @@ static int vmci_guest_probe_device(struct pci_dev *pdev,
 		vmci_dev->notification_bitmap = dma_alloc_coherent(
 			&pdev->dev, PAGE_SIZE, &vmci_dev->notification_base,
 			GFP_KERNEL);
-		if (!vmci_dev->notification_bitmap) {
+		if (!vmci_dev->notification_bitmap)
 			dev_warn(&pdev->dev,
 				 "Unable to allocate notification bitmap\n");
-		} else {
-			memset(vmci_dev->notification_bitmap, 0, PAGE_SIZE);
+		else
 			caps_in_use |= VMCI_CAPS_NOTIFICATIONS;
 	}
-	}
 
 	if (mmio_base != NULL) {
 		if (capabilities & VMCI_CAPS_DMA_DATAGRAM) {