util/genvif.c: Remove duplicated include.
util/genvif.c: Remove duplicated include.

The header file "stdint.h" is included twice.

BUG=none
BRANCH=none
TEST=make buildall -j

Change-Id: Iba6975b65309be032e0ae040d13a7d06a534fc0d
Signed-off-by: Che-yu Wu <f873d6d58b6c6f1a7a73321ec49438787a5975d8@google.com>
Reviewed-on: https://chromium-review.googlesource.com/620291
Reviewed-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec