drivers: base: class: Add a blank line after declarations

This patch fixes the following warning found by checkpatch.pl:
WARNING: Missing a black line after declarations

Signed-off-by: Cosmin Tomulescu <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/base/class.c

···
 			 const void *ns)
 {
 	int error;
+
 	if (cls)
 		error = sysfs_create_file_ns(&cls->p->subsys.kobj,
 					     &attr->attr, ns);
···
 			       struct class_attribute *attr, char *buf)
 {
 	struct class_attribute_string *cs;
+
 	cs = container_of(attr, struct class_attribute_string, attr);
 	return snprintf(buf, PAGE_SIZE, "%s\n", cs->str);
 }