serial: Do not write additional \r before \n for dm_serial drivers

serial-uclass.c code already puts \r before \n for all dm_serial drivers.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/serial/serial_lpuart.c b/drivers/serial/serial_lpuart.c
index ff576da..07941c2 100644
--- a/drivers/serial/serial_lpuart.c
+++ b/drivers/serial/serial_lpuart.c
@@ -349,9 +349,6 @@
 	struct lpuart_fsl_reg32 *base = plat->reg;
 	u32 stat;
 
-	if (c == '\n')
-		serial_putc('\r');
-
 	while (true) {
 		lpuart_read32(plat->flags, &base->stat, &stat);
 
diff --git a/drivers/serial/serial_mpc8xx.c b/drivers/serial/serial_mpc8xx.c
index aeae6ae..808a40f 100644
--- a/drivers/serial/serial_mpc8xx.c
+++ b/drivers/serial/serial_mpc8xx.c
@@ -176,9 +176,6 @@
 	cpm8xx_t	__iomem *cpmp = &(im->im_cpm);
 	struct serialbuffer	__iomem *rtx;
 
-	if (c == '\n')
-		serial_mpc8xx_putc(dev, '\r');
-
 	rtx = (struct serialbuffer __iomem *)&cpmp->cp_dpmem[CPM_SERIAL_BASE];
 
 	/* Wait for last character to go. */