Replace gettimeofday() with clock_gettime(CLOCK_MONOTONIC_RAW, &now),
the reason is same with
commit d08d304508a8 ("eal/linux: make alarm not affected by system time
jump")
Fixes: 81d53291a466 ("net/hinic/base: add various headers")
Cc: stable@dpdk.org
Signed-off-by: Xiaoyun Wang <cloud.wangxiaoyun@huawei.com>