spi: amlogic: Fix error checking on regmap_write call

Currently a call to regmap_write is not being error checked because the
return checke is being performed on the variable ret and this variable
is not assigned the return value from the regmap_write call. Fix this
by adding in the missing assignment.

Fixes: 4670db6 ("spi: amlogic: add driver for Amlogic SPI Flash Controller")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://patch.msgid.link/20250913201612.1338217-1-colin.i.king@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: ColinIanKing

drivers/spi/spi-amlogic-spifc-a4.c

@@ -420,7 +420,7 @@ static int aml_sfc_dma_buffer_setup(struct aml_sfc *sfc, void *databuf,
 		goto out_map_data;
 
 	cmd = CMD_DATA_ADDRH(sfc->daddr);
-	regmap_write(sfc->regmap_base, SFC_CMD, cmd);
+	ret = regmap_write(sfc->regmap_base, SFC_CMD, cmd);
 	if (ret)
 		goto out_map_data;