pcmcia: deprecate CS_SUCCESS

Instead of using own error or success codes, the PCMCIA code should rely on
the generic return values. Therefore, replace all occurrences of CS_SUCCESS
with 0.

CC: netdev@vger.kernel.org
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/drivers/pcmcia/cardbus.c b/drivers/pcmcia/cardbus.c
index 911ca0e..db77e1f 100644
--- a/drivers/pcmcia/cardbus.c
+++ b/drivers/pcmcia/cardbus.c
@@ -238,7 +238,7 @@
 	pci_bus_add_devices(bus);
 
 	s->irq.AssignedIRQ = s->pci_irq;
-	return CS_SUCCESS;
+	return 0;
 }
 
 void cb_free(struct pcmcia_socket * s)