Input: sh_keysc - fix compile warning

The "#if" above should really be an "#ifdef" to avoid this warning:

  CC      drivers/input/keyboard/sh_keysc.o
drivers/input/keyboard/sh_keysc.c:294:5: warning: "CONFIG_PM_SLEEP" is
not defined

Reported-by: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
(cherry picked from commit cca8edfd2ec2a34d9f50f593bc753bb11e1bc1f5)

Signed-off-by: Simon Horman <horms@verge.net.au>
diff --git a/drivers/input/keyboard/sh_keysc.c b/drivers/input/keyboard/sh_keysc.c
index 6876700..934aeb583 100644
--- a/drivers/input/keyboard/sh_keysc.c
+++ b/drivers/input/keyboard/sh_keysc.c
@@ -291,7 +291,7 @@
 	return 0;
 }
 
-#if CONFIG_PM_SLEEP
+#ifdef CONFIG_PM_SLEEP
 static int sh_keysc_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);