ARM: mvebu: Use __init for the PM initialization functions

mvebu_pm_init and mvebu_armada_pm_init are only called during boot, so
flag them with __init and save some memory.
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Reviewed-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>

arch/arm/mach-mvebu/pm-board.c

@@ -76,7 +76,7 @@ static void mvebu_armada_pm_enter(void __iomem *sdram_reg, u32 srcmd)
 		  [ackcmd] "r" (ackcmd), [gpio_ctrl] "r" (gpio_ctrl) : "r1");
 }
 
-static int mvebu_armada_pm_init(void)
+static int __init mvebu_armada_pm_init(void)
 {
 	struct device_node *np;
 	struct device_node *gpio_ctrl_np;

arch/arm/mach-mvebu/pm.c

@@ -194,7 +194,7 @@ static const struct platform_suspend_ops mvebu_pm_ops = {
 	.valid = suspend_valid_only_mem,
 };
 
-int mvebu_pm_init(void (*board_pm_enter)(void __iomem *sdram_reg, u32 srcmd))
+int __init mvebu_pm_init(void (*board_pm_enter)(void __iomem *sdram_reg, u32 srcmd))
 {
 	struct device_node *np;
 	struct resource res;