spi: hisi-sfc-v3xx: Fix a typo ("duall")

Simple typo, simple fix.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20221103190052.915755-1-j.neuschaefer@gmx.netSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-hisi-sfc-v3xx.c

@@ -165,7 +165,7 @@ static int hisi_sfc_v3xx_adjust_op_size(struct spi_mem *mem,
 }
 
 /*
- * The controller only supports Standard SPI mode, Duall mode and
+ * The controller only supports Standard SPI mode, Dual mode and
  * Quad mode. Double sanitize the ops here to avoid OOB access.
  */
 static bool hisi_sfc_v3xx_supports_op(struct spi_mem *mem,