net/hns3: support command interface with firmware

This patch adds support for cmd of hns3 PMD driver, driver can interact
with firmware through command to complete hardware configuration.

Signed-off-by: Hao Chen <chenhao164@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Chunsong Feng <fengchunsong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

drivers/net/hns3/Makefile

@@ -23,5 +23,6 @@ LIBABIVER := 1
 # all source are stored in SRCS-y
 #
 SRCS-$(CONFIG_RTE_LIBRTE_HNS3_PMD) += hns3_ethdev.c
+SRCS-$(CONFIG_RTE_LIBRTE_HNS3_PMD) += hns3_cmd.c
 
 include $(RTE_SDK)/mk/rte.lib.mk