Remove err_dma_mask label from ntb_hw_gen1.c

Label err_dma_mask is not being used and generates a warning at build
time. With CONFIG_WERROR enabled, this warning is treated as error and
breaks the build. This commit removes this label for now.

Signed-off-by: Umer Saleem <usaleem@ixsystems.com>

Author: Umer Saleem

drivers/ntb/hw/intel/ntb_hw_gen1.c

@@ -1778,7 +1778,6 @@ static int intel_ntb_init_pci(struct intel_ntb_dev *ndev, struct pci_dev *pdev)
 	return 0;
 
 err_mmio:
-err_dma_mask:
 	pci_release_regions(pdev);
 err_pci_regions:
 	pci_disable_device(pdev);