Spelling fixes: lenght->length

Signed-off-by: Paulius Zaleckas <pauliusz@yahoo.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c
index 2cd8573..639963e 100644
--- a/drivers/spi/spi_imx.c
+++ b/drivers/spi/spi_imx.c
@@ -157,7 +157,7 @@
 #define SPI_FIFO_BYTE_WIDTH		(2)
 #define SPI_FIFO_OVERFLOW_MARGIN	(2)
 
-/* DMA burst lenght for half full/empty request trigger */
+/* DMA burst length for half full/empty request trigger */
 #define SPI_DMA_BLR			(SPI_FIFO_DEPTH * SPI_FIFO_BYTE_WIDTH / 2)
 
 /* Dummy char output to achieve reads.