drivers: spi: fix some typos

Fix some typos in spi drivers

Signed-off-by: Pengfei Fan <fanpengfei1@eswincomputing.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/spi/spi-sifive.c b/drivers/spi/spi-sifive.c
index 0a00df0..ea372a0 100644
--- a/drivers/spi/spi-sifive.c
+++ b/drivers/spi/spi-sifive.c
@@ -350,7 +350,7 @@
 	if (speed > spi->freq)
 		speed = spi->freq;
 
-	/* Cofigure max speed */
+	/* Configure max speed */
 	scale = (DIV_ROUND_UP(spi->freq >> 1, speed) - 1)
 					& SIFIVE_SPI_SCKDIV_DIV_MASK;
 	writel(scale, spi->regs + SIFIVE_SPI_REG_SCKDIV);