spi: sophgo: fix incorrect type for ret in sg2044_spifmc_write()

The sg2044_spifmc_write() function uses 'ret' of unsigned type
size_t to capture return values from sg2044_spifmc_wait_xfer_size()
and sg2044_spifmc_wait_int(). Since these functions may return
negative error codes, using an unsigned type prevents proper
error detection, as size_t cannot represent negative values.

Change 'ret' to type int so that negative values are handled correctly.

Fixes: de16c32 ("spi: sophgo: add SG2044 SPI NOR controller driver")
Signed-off-by: Qasim Ijaz <qasdev00@gmail.com>
Link: https://patch.msgid.link/20250313214545.7444-1-qasdev00@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: qasim-ijaz

drivers/spi/spi-sg2044-nor.c

@@ -216,7 +216,7 @@ static ssize_t sg2044_spifmc_write(struct sg2044_spifmc *spifmc,
 	size_t xfer_size;
 	const u8 *dout = op->data.buf.out;
 	int i, offset;
-	size_t ret;
+	int ret;
 	u32 reg;
 
 	reg = sg2044_spifmc_init_reg(spifmc);