dm: serial: bcm6345: fix uart stop bits

I missed this when I added support for BMIPS UART driver and it's needed to
achieve a real 115200 8N1 setup.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

drivers/serial/serial_bcm6345.c

@@ -141,6 +141,8 @@ static int bcm6345_serial_init(void __iomem *base, ulong clk, u32 baudrate)
 			UART_CTL_RXTIMEOUT_5 |
 			/* set 8 bits/symbol */
 			UART_CTL_BITSPERSYM_8 |
+			/* set 1 stop bit */
+			UART_CTL_STOPBITS_1 |
 			/* set parity to even */
 			UART_CTL_RXPAREVEN_MASK |
 			UART_CTL_TXPAREVEN_MASK);