scsi: elx: efct: Fix dma_unmap_sg() nents value

scsi: elx: efct: Fix dma_unmap_sg() nents value

[ Upstream commit 3a988d0b65d7d1713ce7596eae288a293f3b938e ]

The dma_unmap_sg() functions should be called with the same nents as the
dma_map_sg(), not the value the map function returned.

Fixes: 692e5d73a811 ("scsi: elx: efct: LIO backend interface routines")
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Link: https://lore.kernel.org/r/20250627114117.188480-2-fourier.thomas@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>