crypto: ux500/hash - Silence compiler warning for !CONFIG_PM

The system PM functions were unused when CONFIG_PM is unset. Let's move
them inside CONFIG_PM_SLEEP to silence the compiler warning.
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/ux500/hash/hash_core.c

@@ -1881,6 +1881,7 @@ static void ux500_hash_shutdown(struct platform_device *pdev)
 			__func__);
 }
 
+#ifdef CONFIG_PM_SLEEP
 /**
  * ux500_hash_suspend - Function that suspends the hash device.
  * @dev:	Device to suspend.
@@ -1949,6 +1950,7 @@ static int ux500_hash_resume(struct device *dev)
 
 	return ret;
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(ux500_hash_pm, ux500_hash_suspend, ux500_hash_resume);