mfd: mc13xxx-spi: Fix typo ("transfert")

That spelling is only correct in French :-)
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20221101165045.1017822-1-j.neuschaefer@gmx.net

drivers/mfd/mc13xxx-spi.c

@@ -114,7 +114,7 @@ static int mc13xxx_spi_write(void *context, const void *data, size_t count)
  * result, the SS will negate before all of the data has been
  * transferred to/from the peripheral."
  * We workaround this by accessing the SPI controller with a
- * single transfert.
+ * single transfer.
  */
 
 static struct regmap_bus regmap_mc13xxx_bus = {