pcmcia: deprecate CS_UNSUPPORTED_*

CS_UNSUPPORTED_MODE and CS_UNSUPPORTED_FUNCTION were mostly used to denote
trying to use PCMCIA functions on CardBus cards.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index 8d37768..71231e8 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -1397,7 +1397,7 @@
 	ret = 0;
 	break;
     default:
-	ret = CS_UNSUPPORTED_FUNCTION;
+	ret = -EINVAL;
 	break;
     }
     return ret;