app/testpmd: rename ambiguous VF config variable
app/testpmd: rename ambiguous VF config variable

Caught while looking at the rx offloads code.

rx_mode is a global variable for the default rx configuration.
Rename the local rx_mode variable in cmd_set_vf_rxmode_parsed.

Fixes: 7741e4cf16c0 ("app/testpmd: VMDq and DCB updates")
Cc: stable@dpdk.org

Signed-off-by: David Marchand <f28529695cfa9e3e1eb84e7072aa626af4abb18e@redhat.com>
Acked-by: Bernard Iremonger <233eeff376ad0c06f66f06c5522ea3c4feb30d3b@intel.com>

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