staging: sync: Add compat_ioctl handlers to sync drivers

The sync drivers are missing compat_ioctl handlers, so this
patch adds them.

The same change has been submitted to AOSP:
        https://android-review.googlesource.com/#/c/54901/
        Change-Id: If1a1ecc3952b321c8d64c6a8b050104859efc4b1

Cc: Erik Gilling <konkers@android.com>
Cc: Dmitry Pervushin <dmitry.pervushin@linaro.org>
Cc: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Dmitry Pervushin <dmitry.pervushin@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/sw_sync.c

@@ -239,6 +239,7 @@ static const struct file_operations sw_sync_fops = {
 	.open = sw_sync_open,
 	.release = sw_sync_release,
 	.unlocked_ioctl = sw_sync_ioctl,
+	.compat_ioctl = sw_sync_ioctl,
 };
 
 static struct miscdevice sw_sync_dev = {

drivers/staging/android/sync.c

@@ -248,6 +248,7 @@ static const struct file_operations sync_fence_fops = {
 	.release = sync_fence_release,
 	.poll = sync_fence_poll,
 	.unlocked_ioctl = sync_fence_ioctl,
+	.compat_ioctl = sync_fence_ioctl,
 };
 
 static struct sync_fence *sync_fence_alloc(const char *name)