staging: greybus: audio_manager_sysfs: Replace sscanf with kstrto* to single variable conversion.

Fix checkpatch warning:

WARNING: Prefer kstrto<type> to single variable sscanf

kstrto* is designed to convert string to numerical value and makes
it easier to understand what the code does.
Signed-off-by: Elise Lennion <elise.lennion@gmail.com>
Reviewed-by: Mark Greer <mgreer@animalcreek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/audio_manager_sysfs.c

@@ -44,7 +44,7 @@ static ssize_t manager_sysfs_remove_store(
 {
 	int id;
 
-	int num = sscanf(buf, "%d", &id);
+	int num = kstrtoint(buf, 10, &id);
 
 	if (num != 1)
 		return -EINVAL;
@@ -65,7 +65,7 @@ static ssize_t manager_sysfs_dump_store(
 {
 	int id;
 
-	int num = sscanf(buf, "%d", &id);
+	int num = kstrtoint(buf, 10, &id);
 
 	if (num == 1) {
 		num = gb_audio_manager_dump_module(id);