nvmem: rockchip-otp: set add_legacy_fixed_of_cells config option

The Rockchip OTP describes its layout via devicetree subnodes,
so set the appropriate property.

Fixes: 2cc3b37 ("nvmem: add explicit config option to read old syntax fixed OF cells")
Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20240705074852.423202-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Heiko Stuebner

drivers/nvmem/rockchip-otp.c

@@ -255,6 +255,7 @@ static int rockchip_otp_read(void *context, unsigned int offset,
 static struct nvmem_config otp_config = {
 	.name = "rockchip-otp",
 	.owner = THIS_MODULE,
+	.add_legacy_fixed_of_cells = true,
 	.read_only = true,
 	.stride = 1,
 	.word_size = 1,