spi: stm32-qspi: Fix compilation warning in ARM64

This fixes warnings detected when compiling in ARM64.
Introduced by 'commit 18674dee3c ("spi: stm32-qspi: Add dirmap support")'

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20210420082103.1693-1-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-stm32-qspi.c

@@ -478,7 +478,7 @@ static ssize_t stm32_qspi_dirmap_read(struct spi_mem_dirmap_desc *desc,
 	 * all needed transfer information into struct spi_mem_op
 	 */
 	memcpy(&op, &desc->info.op_tmpl, sizeof(struct spi_mem_op));
-	dev_dbg(qspi->dev, "%s len = 0x%x offs = 0x%llx buf = 0x%p\n", __func__, len, offs, buf);
+	dev_dbg(qspi->dev, "%s len = 0x%lx offs = 0x%llx buf = 0x%p\n", __func__, len, offs, buf);
 
 	op.data.nbytes = len;
 	op.addr.val = desc->info.offset + offs;