RDMA/hns: Add check and adjust for function resource values

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8H7RB



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Currently, RoCE driver gets function resource values from firmware without
validity check. As these resources are mostly related to memory, an
invalid value may lead to serious consequence such as kernel panic.

This patch adds check for these resource values and adjusts the invalid
ones.

Fixes: 74e1531c ("RDMA/hns: Reserve the resource for the VFs")
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>