Staging: dgnc: avoiding buffer overflow

drivers/staging/dgnc/dgnc_neo.c:1969 neo_vpd() error: buffer overflow 'brd->vpd' 128 <= 128
drivers/staging/dgnc/dgnc_neo.c:1970 neo_vpd() warn: buffer overflow 'brd->vpd' 128 <= 130
drivers/staging/dgnc/dgnc_neo.c:1970 neo_vpd() warn: buffer overflow 'brd->vpd' 128 <= 130

Signed-off-by: Ashvini Varatharaj <ashvinivaratharaj@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_neo.c

@@ -1965,7 +1965,7 @@ static void neo_vpd(struct dgnc_board *brd)
 	}
 	else {
 		/* Search for the serial number */
-		for (i = 0; i < NEO_VPD_IMAGESIZE * 2; i++) {
+		for (i = 0; i < NEO_VPD_IMAGEBYTES - 3; i++) {
 			if (brd->vpd[i] == 'S' && brd->vpd[i + 1] == 'N') {
 				strncpy(brd->serial_num, &(brd->vpd[i + 3]), 9);
 			}