net/cxgbe: remove useless C++ include guard
net/cxgbe: remove useless C++ include guard

Remove the incomplete cplusplus guard in internal header.

Fixes: 3bd122eef2cc ("cxgbe/base: add hardware API for Chelsio T5 series adapters")

Signed-off-by: Weiguo Li <9d74fa1db2adfc67cecdb75bdffcce563fe33719@foxmail.com>

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