uefi-raw: add tcpv4 protocol definitions

Author: JayKickliter

uefi-raw/src/protocol/network/mod.rs

@@ -6,4 +6,5 @@ pub mod ip4;
 pub mod ip4_config2;
 pub mod pxe;
 pub mod snp;
+pub mod tcpv4;
 pub mod tls;