Revert "stm32f4: fix serial output"

As per the author, we don't need this patch really since the other patch
"stm32f4: fix serial output" superseded it.

This reverts commit 85e5f5b7a7f8d889271f94791606cde62d81d53f.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/serial/serial_stm32.c b/drivers/serial/serial_stm32.c
index 8b2830b..1b22c69 100644
--- a/drivers/serial/serial_stm32.c
+++ b/drivers/serial/serial_stm32.c
@@ -128,9 +128,6 @@
 	struct stm32_serial *usart =
 		(struct stm32_serial *)usart_base[USART_PORT];
 
-	if (c == '\n')
-		stm32_serial_putc('\r');
-
 	while ((readl(&usart->sr) & USART_SR_FLAG_TXE) == 0)
 		;
 	writel(c, &usart->dr);