net/vmxnet3: fix missing register command

vmxnet3 uses capability registers to advertise the supported
capabilities of UPT device. It uses DCR0_REG command register for this
purpose.
However, the register command enum misses one command which technically
is not used by dpdk vmxnet3 driver yet.

This can cause issue for commands added later.
For example, DCR0_REG and MAX_CAPABILITIES register commands when issued
will lead to incorrect command being executed in the hypervisor. The
return values can be unexpected and can result in some capabilities
being disabled and affect vnics requesting Uniform Passthroguh (UPT)
mode.

This patch fixes this issue by adding a reserved command in its place.

Fixes: 5241d61 ("net/vmxnet3: support capability registers")
Cc: stable@dpdk.org

Signed-off-by: Ronak Doshi <ronak.doshi@broadcom.com>
Acked-by: Ferruh Yigit <ferruh.yigit@amd.com>

.mailmap

@@ -1228,7 +1228,7 @@ Roman Kapl <rka@sysgo.com>
 Roman Korynkevych <romanx.korynkevych@intel.com>
 Roman Storozhenko <roman.storozhenko@intel.com>
 Roman Zhukov <roman.zhukov@arknetworks.am> <roman.zhukov@oktetlabs.ru>
-Ronak Doshi <doshir@vmware.com>
+Ronak Doshi <ronak.doshi@broadcom.com> <doshir@vmware.com>
 Ron Beider <rbeider@amazon.com>
 Ronghua Zhang <rzhang@vmware.com>
 RongQiang Xie <xie.rongqiang@zte.com.cn>

drivers/net/vmxnet3/base/vmxnet3_defs.h

@@ -126,6 +126,7 @@ typedef enum {
    VMXNET3_CMD_RESERVED7,
    VMXNET3_CMD_RESERVED8,
    VMXNET3_CMD_GET_MAX_QUEUES_CONF,
+   VMXNET3_CMD_RESERVED11,
    VMXNET3_CMD_GET_MAX_CAPABILITIES,
    VMXNET3_CMD_GET_DCR0_REG,
 } Vmxnet3_Cmd;