net/e1000: fix MAC type checking
net/e1000: fix MAC type checking

The mac types of i219 are e1000_pch_spt and e1000_pch_cnp, correct the
checking code of mac type when flushing i219 descriptor rings.

Fixes: 1fc9701238ed ("net/e1000: fix i219 hang on reset/close")
Cc: stable@dpdk.org

Reported-by: Kevin Traynor <1f46c93815774a2e602547cf1e37c682d62b566d@redhat.com>
Signed-off-by: Xiao Zhang <e866cfeaa4d3c2b680d7d7e13894b33652b9aeaf@intel.com>
Acked-by: Kevin Traynor <1f46c93815774a2e602547cf1e37c682d62b566d@redhat.com>
Reviewed-by: Xiaolong Ye <c7d6fc2f7e22da80deb234d523238b510a8c0f08@intel.com>

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