libcg: cgdcbxd: create man page
libcg: cgdcbxd: create man page

Create man page for cgdcbxd.

Signed-off-by: John Fastabend <06228589568acf528fa1984e09626513a30b66ed@intel.com>

jrfastab/Linux-cgdcbxd,jrfastab/Linux-cgdcbxd,jrfastab/Linux-cgdcbxd,jrfastab/Linux-cgdcbxd