This splits L2CAP commands under 'bt' to 'l2cap' removing 'l2cap-'
prefix from the commands:
l2cap - Bluetooth L2CAP shell commands
Options:
-h, --help :Show command help.
Subcommands:
connect :<psm>
disconnect :[none]
metrics :<value on, off>
recv :[delay (in miliseconds)
register :<psm> [sec_level]
send :<number of packets>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>