net/cxgbe: add prefix to global functions

net/cxgbe: add prefix to global functions

To avoid name collisions, add cxgbe_ prefix to some global functions.
Also, make some local functions static in cxgbe_filter.c.

Fixes: ee61f5113b17 ("net/cxgbe: parse and validate flows")
Fixes: 9eb2c9a48072 ("net/cxgbe: implement flow create operation")
Fixes: 3a381a4116ed ("net/cxgbe: query firmware for HASH filter resources")
Fixes: af44a577988b ("net/cxgbe: support to offload flows to HASH region")
Fixes: 41dc98b0827a ("net/cxgbe: support to delete flows in HASH region")
Fixes: 23af667f1507 ("net/cxgbe: add API to program hardware layer 2 table")
Cc: stable@dpdk.org
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>