staging: dgnc: DGNC_VERIFY_BOARD macro in do while block

Enclose the body of the multi-statement DGNC_VERIFY_BOARD macro inside a
do - while block as per Documentation/CodingStyle.  Fixes 1 error found
by checkpatch.pl.

Cc: Lidza Louina <lidza.louina@gmail.com>
Signed-off-by: Jeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_sysfs.c

@@ -151,6 +151,7 @@ void dgnc_remove_driver_sysfiles(struct pci_driver *dgnc_driver)
 
 
 #define DGNC_VERIFY_BOARD(p, bd)				\
+	do {							\
 		if (!p)						\
 			return 0;				\
 								\
@@ -159,6 +160,7 @@ void dgnc_remove_driver_sysfiles(struct pci_driver *dgnc_driver)
 			return 0;				\
 		if (bd->state != BOARD_READY)			\
 			return 0;				\
+	} while (0)