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/ds.c b/drivers/pcmcia/ds.c
index a393501..20bef0c 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -187,7 +187,7 @@
 	else
 		printk("%s: Unknown error code %#x\n", serv, err->retcode);
 
-	return CS_SUCCESS;
+	return 0;
 } /* report_error */
 
 /* end of code which was in cs.c before */