spi: atmel-quadspi: Fix wrong register value written to MR

commit 162d9b5d2308c7e48efbc97d36babbf4d73b2c61 upstream.

aq->mr should go to MR, nothing else.

Fixes: 329ca3eed4a9 ("spi: atmel-quadspi: Avoid overwriting delay register settings")
Signed-off-by: Alexander Dahl <ada@thorsis.com>
Link: https://lore.kernel.org/linux-spi/20240926-macarena-wincing-7c4995487a29@thorsis.com/T/#u
Link: https://patch.msgid.link/20240926090356.105789-1-ada@thorsis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c
index bf7999a..6f9e9d8 100644
--- a/drivers/spi/atmel-quadspi.c
+++ b/drivers/spi/atmel-quadspi.c
@@ -377,7 +377,7 @@ static int atmel_qspi_set_cfg(struct atmel_qspi *aq,
 	 */
 	if (!(aq->mr & QSPI_MR_SMM)) {
 		aq->mr |= QSPI_MR_SMM;
-		atmel_qspi_write(aq->scr, aq, QSPI_MR);
+		atmel_qspi_write(aq->mr, aq, QSPI_MR);
 	}
 
 	/* Clear pending interrupts */