[MIPS] IP32: Fix address of 2nd serial interface.

Found by Giuseppe Sacco <giuseppe@eppesuigoccas.homedns.org>.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/sgi-ip32/ip32-platform.c

@@ -42,7 +42,7 @@ static struct platform_device uart8250_device = {
 static int __init uart8250_init(void)
 {
 	uart8250_data[0].membase = (void __iomem *) &mace->isa.serial1;
-	uart8250_data[1].membase = (void __iomem *) &mace->isa.serial1;
+	uart8250_data[1].membase = (void __iomem *) &mace->isa.serial2;
 
 	return platform_device_register(&uart8250_device);
 }