ARM: imx: avic: Move avic_saved_mask_reg under CONFIG_PM

When building a kernel with CONFIG_PM undefined, the following warning happens:

arch/arm/mach-imx/avic.c:57:12: warning: 'avic_saved_mask_reg' defined but not used [-Wunused-variable]

Move avic_saved_mask_reg definition inside the '#ifdef CONFIG_PM' block to
avoid the warning.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/avic.c

@@ -54,8 +54,6 @@
 void __iomem *avic_base;
 static struct irq_domain *domain;
 
-static u32 avic_saved_mask_reg[2];
-
 #ifdef CONFIG_MXC_IRQ_PRIOR
 static int avic_irq_set_priority(unsigned char irq, unsigned char prio)
 {
@@ -113,6 +111,8 @@ static struct mxc_extra_irq avic_extra_irq = {
 };
 
 #ifdef CONFIG_PM
+static u32 avic_saved_mask_reg[2];
+
 static void avic_irq_suspend(struct irq_data *d)
 {
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);