Add return value checking when reading configure information from PCI
register to avoid Coverity issue.
Fixes: 1fc97012 ("net/e1000: fix i219 hang on reset/close")
Cc: stable@dpdk.org
Signed-off-by: Xiao Zhang <xiao.zhang@intel.com>
Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>