driver core: add missing blank line after declaration

Found using checkpatch.pl
Signed-off-by: Lavinia Tache <lavinia.tachee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 9e29943..4eabfe2 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -103,6 +103,7 @@
 		       const struct driver_attribute *attr)
 {
 	int error;
+
 	if (drv)
 		error = sysfs_create_file(&drv->p->kobj, &attr->attr);
 	else