ARM: highbank: call highbank_pm_init from .init_machine

Being a module_init call, highbank_pm_init will cause problem with
multi-platform build running on other platforms.  Call it from
.init_machine instead.

Reported-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/mach-highbank/core.h b/arch/arm/mach-highbank/core.h
index 141ed51..8b9fb1a 100644
--- a/arch/arm/mach-highbank/core.h
+++ b/arch/arm/mach-highbank/core.h
@@ -8,4 +8,10 @@
 static inline void highbank_lluart_map_io(void) {}
 #endif
 
+#ifdef CONFIG_PM_SLEEP
+extern void highbank_pm_init(void);
+#else
+static inline void highbank_pm_init(void) {}
+#endif
+
 extern void highbank_smc1(int fn, int arg);