spi: stm32: Fix parameters for spi_split_transfers_maxwords()

The patch posted at
https://lore.kernel.org/r/20240206200648.1782234-1-dlechner@baylibre.com
was based on next-20240207 (and was applied as c0c0293 ("spi: drop
gpf arg from __spi_split_transfer_maxsize()") for v6.9-rc1).

However when applied to a v6.6 based tree, the conflict with commit
f6cd662 ("spi: stm32: add st,stm32mp25-spi compatible supporting
STM32MP25 soc") wasn't resolved correctly.

Fix that to make the driver build again.

Fixes: 98847e6 ("spi: drop gpf arg from __spi_split_transfer_maxsize()")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>

Author: ukleinek

drivers/spi/spi-stm32.c

@@ -1011,7 +1011,8 @@ static int stm32_spi_prepare_msg(struct spi_controller *ctrl,
 	if (spi->cfg->set_number_of_data) {
 		int ret;
 
-		ret = spi_split_transfers_maxwords(ctrl, msg, spi->t_size_max);
+		ret = spi_split_transfers_maxwords(ctrl, msg,
+						   STM32H7_SPI_TSIZE_MAX);
 		if (ret)
 			return ret;
 	}