b541ba195c
r324539 gathered some vnet decls into netinet/tcp_var.h, so that they are now redundant in dev/cxgbe/tom/{t4_cpl_io.c,t4_ddp.c}. This triggers gcc -Wredundant-decls. Reviewed by: np Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D12674