net/hns3: fix key length when configuring RSS
net/hns3: fix key length when configuring RSS

When users set the length of RSS hash key greater than the supported
length by hardware, the driver should intercept and can not configure
the wrong key into the hardware.

Fixes: c37ca66f2b27 ("net/hns3: support RSS")
Cc: stable@dpdk.org

Signed-off-by: Lijun Ou <4f660ba6ca3aa3bf060789cece061ff7ba22d4fe@huawei.com>
Signed-off-by: Wei Hu (Xavier) <0e556b9333cda22a2a365b940422aea48fdffc88@huawei.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk