ARM: kirkwood: Add LS-XHL and LS-CHLv2 support

Add support for Buffalo Linkstation LS-XHL and LS-CHLv2 using the device
tree where possible.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
diff --git a/arch/arm/mach-kirkwood/common.h b/arch/arm/mach-kirkwood/common.h
index 2fd03ad..304dd1a 100644
--- a/arch/arm/mach-kirkwood/common.h
+++ b/arch/arm/mach-kirkwood/common.h
@@ -88,6 +88,12 @@
 static inline void goflexnet_init(void) {};
 #endif
 
+#ifdef CONFIG_MACH_LSXL_DT
+void lsxl_init(void);
+#else
+static inline void lsxl_init(void) {};
+#endif
+
 /* early init functions not converted to fdt yet */
 char *kirkwood_id(void);
 void kirkwood_l2_init(void);