ARM: pl011: Add rs485 to the RP1 support

pl011_axi_probe, added for RP1 support, lacks the rs485 additions that
appeared during its development.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

drivers/tty/serial/amba-pl011.c

@@ -3033,6 +3033,8 @@ static int pl011_axi_probe(struct platform_device *pdev)
 	uap->port.iotype = vendor->access_32b ? UPIO_MEM32 : UPIO_MEM;
 	uap->port.irq = irq;
 	uap->port.ops = &amba_pl011_pops;
+	uap->port.rs485_config = pl011_rs485_config;
+	uap->port.rs485_supported = pl011_rs485_supported;
 
 	snprintf(uap->type, sizeof(uap->type), "PL011 AXI");