[PCMCIA] Add per-socket thread to process socket events.

Add a per-socket kernel thread, which is responsible for processing
insertion, removal, battery status and ready status changes.  We
also add a semaphore to prevent multiple threads trying to change
the socket suspend/present state.

This will allows us to eliminate the per-socket work queues, and
will allow us to handle the card insertion without resources
cleanly.

drivers/pcmcia/cs_internal.h

@@ -133,7 +133,6 @@ typedef struct socket_info_t {
     u_short			lock_count;
     client_handle_t		clients;
     u_int			real_clients;
-    client_handle_t		reset_handle;
     pccard_mem_map		cis_mem;
     u_char			*cis_virt;
     config_t			*config;
@@ -155,6 +154,14 @@ typedef struct socket_info_t {
 #ifdef CONFIG_PROC_FS
     struct proc_dir_entry	*proc;
 #endif
+
+    struct semaphore		skt_sem;	/* protects socket h/w state */
+
+    struct task_struct		*thread;
+    struct completion		thread_done;
+    wait_queue_head_t		thread_wait;
+    spinlock_t			thread_lock;	/* protects thread_events */
+    unsigned int		thread_events;
 } socket_info_t;
 
 /* Flags in config state */