RDMA/efa: Use dma_set_mask_and_coherent() to simplify code

Use dma_set_mask_and_coherent() instead of pci_set_dma_mask() followed by
a pci_set_consistent_dma_mask().

Link: https://lore.kernel.org/r/20201201091811.37984-1-galpress@amazon.com


Reviewed-by: Firas JahJah <firasj@amazon.com>
Reviewed-by: Yossi Leybovich <sleybo@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>