crypto: hisilicon/trng - use %u to print u32 variables

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I79JTN


CVE: NA

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The 'dlen' is u32 type, use %u instead of %d to print u32 values.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: JiangShui Yang <yangjiangshui@h-partners.com>