staging: dgap: Merge dgap_fep5.h into dgap_driver.h

There is a lot of cleanup work to do on these digi drivers and merging as
much as is possible will make it easier. I also notice that many merged
drivers are single source and header.
Signed-off-by: Mark Hounschell <markh@compro.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgap/dgap_driver.c

@@ -51,7 +51,6 @@
 
 #include "dgap_driver.h"
 #include "dgap_pci.h"
-#include "dgap_fep5.h"
 #include "dgap_conf.h"
 #include "dgap_parse.h"
 #include "dgap_types.h"