pcmcia: simplify event callback

The event callback for handling 16bit PCMCIA cards only needs to be
informed about a few events. Furthermore, send_event may already
only be called with skt->skt_mutex held, which also protects against
the module being removed behind the callback's back.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/pcmcia/ds.c

@@ -1253,9 +1253,6 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 		pcmcia_card_add(skt);
 		break;
 
-	case CS_EVENT_EJECTION_REQUEST:
-		break;
-
 	case CS_EVENT_PM_RESUME:
 		if (verify_cis_cache(skt) != 0) {
 			dev_dbg(&skt->dev, "cis mismatch - different card\n");
@@ -1273,9 +1270,6 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
 		}
 		break;
 
-	case CS_EVENT_PM_SUSPEND:
-	case CS_EVENT_RESET_PHYSICAL:
-	case CS_EVENT_CARD_RESET:
 	default:
 		break;
     }