nvme-pci: set the DMA mask earlier

Set the DMA mask before calling dma_addressing_limited, which depends on it.

Note that this stop checking the return value of dma_set_mask_and_coherent
as this function can only fail for masks < 32-bit.

Fixes: 3f30a79c ("nvme-pci: set constant paramters in nvme_pci_alloc_ctrl")
Reported-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Michael Kelley <mikelley@microsoft.com>