pcmcia: use pccardd to handle eject, insert, suspend and resume requests

This avoids any sysfs-related deadlock (or lockdep warning), such
as reported at http://lkml.org/lkml/2010/1/17/88 .

Reported-by: Ming Lei <tom.leiming@gmail.com>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

include/pcmcia/ss.h

@@ -200,13 +200,14 @@ struct pcmcia_socket {
 	struct task_struct		*thread;
 	struct completion		thread_done;
 	unsigned int			thread_events;
+	unsigned int			sysfs_events;
 
 	/* For the non-trivial interaction between these locks,
 	 * see Documentation/pcmcia/locking.txt */
 	struct mutex			skt_mutex;
 	struct mutex			ops_mutex;
 
-	/* protects thread_events */
+	/* protects thread_events and sysfs_events */
 	spinlock_t			thread_lock;
 
 	/* pcmcia (16-bit) */