regulator: mcp16502: Use #ifdef CONFIG_PM_SLEEP around mcp16502_suspend/resume_noirq

mcp16502_suspend/resume_noirq is only used by SET_NOIRQ_SYSTEM_SLEEP_PM_OPS
when CONFIG_PM_SLEEP is defined.
So use #ifdef CONFIG_PM_SLEEP instead CONFIG_SUSPEND guard.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mcp16502.c

@@ -497,7 +497,7 @@ static int mcp16502_probe(struct i2c_client *client,
 	return 0;
 }
 
-#ifdef CONFIG_SUSPEND
+#ifdef CONFIG_PM_SLEEP
 static int mcp16502_suspend_noirq(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -517,10 +517,7 @@ static int mcp16502_resume_noirq(struct device *dev)
 
 	return 0;
 }
-#else /* !CONFIG_SUSPEND */
-#define mcp16502_suspend_noirq NULL
-#define mcp16502_resume_noirq NULL
-#endif /* !CONFIG_SUSPEND */
+#endif
 
 #ifdef CONFIG_PM
 static const struct dev_pm_ops mcp16502_pm_ops = {