ufdt: use size_t for iteration in ufdt_apply_multioverlay

This makes it compile with -Wall -Wextra -Werror, both clang and g++.

Change-Id: Iabe5d849a21590c39ebaa67777dea9b58fd7c057
Signed-off-by: Bingwu Zhang <xtexchooser@duck.com>
1 file changed