staging: greybus: authentication.c: Fix alignment should match open parenthesis

Fix the following error found by checkpatch.pl:
CHECK: Alignment should match open parenthesis
+static int cap_ioctl(struct gb_cap *cap, unsigned int cmd,
+			 void __user *buf)
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/authentication.c

@@ -202,7 +202,7 @@ static int cap_release(struct inode *inode, struct file *file)
 }
 
 static int cap_ioctl(struct gb_cap *cap, unsigned int cmd,
-			 void __user *buf)
+		     void __user *buf)
 {
 	struct cap_ioc_get_endpoint_uid endpoint_uid;
 	struct cap_ioc_get_ims_certificate *ims_cert;