Staging: comedi: fix up remaining coding style issue in proc.c

Move the external variable into a .h file, where it belongs.

Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/comedi/comedi_fops.h

···
 extern struct class *comedi_class;
 extern const struct file_operations comedi_fops;
 extern int comedi_autoconfig;
+extern struct comedi_driver *comedi_drivers;
 
 #endif /* _COMEDI_FOPS_H */

drivers/staging/comedi/proc.c

···
 
 #define __NO_VERSION__
 #include "comedidev.h"
+#include "comedi_fops.h"
 #include <linux/proc_fs.h>
 /* #include <linux/string.h> */
-
-extern struct comedi_driver *comedi_drivers;
 
 int comedi_read_procmem(char *buf, char **start, off_t offset, int len,
 			int *eof, void *data)