ARM: common: edma: edma_pm_resume may be unused

The recently introduced resume hook in the edma driver
is not referenced when CONFIG_PM_SLEEP is not set, which
results in a compile warning in keystone builds.

This adds an appropriate #ifdef.

Cc: Nishanth Menon <nm@ti.com>
Cc: Daniel Mack <zonque@gmail.com>
Cc: Joel Fernandes <joelf@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Fixes: a2b1175131: ("ARM: common: edma: add suspend resume hook")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/common/edma.c

@@ -1801,6 +1801,7 @@ static int edma_probe(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int edma_pm_resume(struct device *dev)
 {
 	int i, j;
@@ -1840,6 +1841,7 @@ static int edma_pm_resume(struct device *dev)
 
 	return 0;
 }
+#endif
 
 static const struct dev_pm_ops edma_pm_ops = {
 	SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, edma_pm_resume)