fnic: pci_dma_mapping_error() doesn't return an error code

fnic: pci_dma_mapping_error() doesn't return an error code

pci_dma_mapping_error() returns true on error and false on success.

Fixes: fd6ddfa4c1dd ('fnic: check pci_map_single() return value')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit dd7328e4c53649c1c7ec36bc1cf5b229b8662047)

Orabug: 27587343
Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>