bcm47xx: make it possible to build bcm47xx without ssb.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/arch/mips/bcm47xx/serial.c b/arch/mips/bcm47xx/serial.c
index 17c67e2..fcef688 100644
--- a/arch/mips/bcm47xx/serial.c
+++ b/arch/mips/bcm47xx/serial.c
@@ -23,6 +23,7 @@
 	},
 };
 
+#ifdef CONFIG_BCM47XX_SSB
 static int __init uart8250_init_ssb(void)
 {
 	int i;
@@ -44,12 +45,15 @@
 	}
 	return platform_device_register(&uart8250_device);
 }
+#endif
 
 static int __init uart8250_init(void)
 {
 	switch (bcm47xx_bus_type) {
+#ifdef CONFIG_BCM47XX_SSB
 	case BCM47XX_BUS_TYPE_SSB:
 		return uart8250_init_ssb();
+#endif
 	}
 	return -EINVAL;
 }