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>

arch/arm/mach-highbank/highbank.c

@@ -152,6 +152,7 @@ static void highbank_power_off(void)
 static void __init highbank_init(void)
 {
 	pm_power_off = highbank_power_off;
+	highbank_pm_init();
 
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }