app/testpmd: add TM command for non-leaf and packet mode

app/testpmd: add TM command for non-leaf and packet mode

Add TM command to enable packet mode for all SP children
in non leaf node. This is a new command as
"add tm nonleaf node pktmode".

Also add support to shaper profile add command to take
packet mode parameter used to setup shaper in packet mode.
This adds an extra argument "packet_mode" to shaper profile add command
"add port tm node shaper profile" as last argument.

This patch also dumps new tm port/level/node capabilities
sched_wfq_packet_mode_supported, sched_wfq_byte_mode_supported,
shaper_private_packet_mode_supported, shaper_private_byte_mode_supported,
shaper_shared_packet_mode_supported, shaper_shared_byte_mode_supported.

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>