[PATCH] irqchip: st: avoid compile error when PM is disabled

[Chris Packham <chris.packham@alliedtelesis.co.nz>]

When power management is disabled in the kernel configuration compiler
will complain that st_irq_syscfg_resume is defined but not used. Wrap
the function definition with CONFIG_PM_SLEEP as per other users of
SIMPLE_DEV_PM_OPS.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
---
 drivers/irqchip/irq-st.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/irqchip/irq-st.c b/drivers/irqchip/irq-st.c
index 9af48a85c16f..afec640b6d65 100644
--- a/drivers/irqchip/irq-st.c
+++ b/drivers/irqchip/irq-st.c
@@ -180,6 +180,7 @@ static int st_irq_syscfg_probe(struct platform_device *pdev)
 	return st_irq_syscfg_enable(pdev);
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int st_irq_syscfg_resume(struct device *dev)
 {
 	struct st_irq_syscfg *ddata = dev_get_drvdata(dev);
@@ -187,6 +188,7 @@ static int st_irq_syscfg_resume(struct device *dev)
 	return regmap_update_bits(ddata->regmap, ddata->syscfg,
 				  ST_A9_IRQ_MASK, ddata->config);
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(st_irq_syscfg_pm_ops, NULL, st_irq_syscfg_resume);
 
-- 
2.11.0.24.ge6920cf