nvmem: spmi-mfd: Use legacy OF cell format

Signed-off-by: Marc Zyngier <maz@kernel.org>
diff --git a/drivers/nvmem/spmi-mfd-nvmem.c b/drivers/nvmem/spmi-mfd-nvmem.c
index e74ced4..462f350 100644
--- a/drivers/nvmem/spmi-mfd-nvmem.c
+++ b/drivers/nvmem/spmi-mfd-nvmem.c
@@ -46,6 +46,7 @@ static int spmi_mfd_nvmem_probe(struct platform_device *pdev)
 		.stride = 1,
 		.reg_read = spmi_mfd_nvmem_read,
 		.reg_write = spmi_mfd_nvmem_write,
+		.add_legacy_fixed_of_cells = true,
 	};
 
 	nvmem = devm_kzalloc(&pdev->dev, sizeof(*nvmem), GFP_KERNEL);