Remove superfluous casts

Remove superfluous casts

The le64_to_cpu() definition is as follows:

  #define le64_to_cpu(x) le64toh((__force __u64)(x))

According to the le64toh() man page, the return type of that function
is uint64_t. Hence drop the cast from (uint64_t)le64_to_cpu(x)
expressions. This patch has been generated as follows:

  git ls-tree --name-only -r HEAD |
    while read f; do
      [ -f "$f" ] && sed -i 's/(uint64_t)le64_to_cpu(/le64_to_cpu(/g' "$f"
    done

Signed-off-by: Bart Van Assche <bvanassche@acm.org>