staging: slicoss: fix a leak when kzalloc fail

slic_card_locate does a kzalloc of physcard, and if it fails,
in my previous patch i returned -ENOMEM, but left the driver leak
the memory if card_hostid == SLIC_HOSTID_DEFAULT,

fix this memory leak if the above condition is true
Signed-off-by: NDevendra Naga <devendra.aaru@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/slicoss/slicoss.c

@@ -3657,8 +3657,11 @@ static u32 slic_card_locate(struct adapter *adapter)
 	if (!physcard) {
 		/* no structure allocated for this physical card yet */
 		physcard = kzalloc(sizeof(struct physcard), GFP_ATOMIC);
-		if (!physcard)
+		if (!physcard) {
+			if (card_hostid == SLIC_HOSTID_DEFAULT)
+				kfree(card);
 			return -ENOMEM;
+		}
 
 		physcard->next = slic_global.phys_card;
 		slic_global.phys_card = physcard;