net/i40e: fix returned code for RSS hardware failure

net/i40e: fix returned code for RSS hardware failure

The API should return the system error status, but it returned the
hardware error status, this is confuses the caller.
This patch adds check on hardware execution status and returns -EIO
in case of hardware execution failure.

Fixes: 1d4b2b4966bb ("net/i40e: fix VF overwrite PF RSS LUT for X722")
Fixes: d0a349409bd7 ("i40e: support AQ based RSS config")
Cc: stable@dpdk.org
Signed-off-by: Alvin Zhang <alvinx.zhang@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>