sysfs: add sysfs_create/remove_groups for when SYSFS is not enabled

We need these functions for when CONFIG_SYSFS=n.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

include/linux/sysfs.h

@@ -350,6 +350,11 @@ static inline int sysfs_create_group(struct kobject *kobj,
 	return 0;
 }
 
+static inline int sysfs_create_groups(struct kobject *kobj,
+				      const struct attribute_group **groups)
+{
+}
+
 static inline int sysfs_update_group(struct kobject *kobj,
 				const struct attribute_group *grp)
 {
@@ -361,6 +366,11 @@ static inline void sysfs_remove_group(struct kobject *kobj,
 {
 }
 
+static inline void sysfs_remove_groups(struct kobject *kobj,
+				       const struct attribute_group **groups)
+{
+}
+
 static inline int sysfs_add_file_to_group(struct kobject *kobj,
 		const struct attribute *attr, const char *group)
 {