Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c
index 9a61964..b1a4b9f 100644
--- a/drivers/spi/dw_spi.c
+++ b/drivers/spi/dw_spi.c
@@ -345,7 +345,7 @@
 
 void dw_spi_xfer_done(struct dw_spi *dws)
 {
-	/* Update total byte transfered return count actual bytes read */
+	/* Update total byte transferred return count actual bytes read */
 	dws->cur_msg->actual_length += dws->len;
 
 	/* Move to next transfer */