Fixed GCC 4.4 build issues due to EFIAPI not being used when required.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10379 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Driver.c

@@ -114,6 +114,7 @@ Mtftp4DriverBindingSupported (
 
 **/
 EFI_STATUS
+EFIAPI
 Mtftp4ConfigNullUdp (
   IN UDP_IO                 *UdpIo,
   IN VOID                   *Context

MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Rrq.c

@@ -26,6 +26,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 **/
 VOID
+EFIAPI
 Mtftp4RrqInput (
   IN NET_BUF                *UdpPacket,
   IN UDP_END_POINT          *EndPoint,
@@ -379,6 +380,7 @@ Mtftp4RrqOackValid (
 
 **/
 EFI_STATUS
+EFIAPI
 Mtftp4RrqConfigMcastPort (
   IN UDP_IO                 *McastIo,
   IN VOID                   *Context
@@ -605,6 +607,7 @@ Mtftp4RrqHandleOack (
 
 **/
 VOID
+EFIAPI
 Mtftp4RrqInput (
   IN NET_BUF                *UdpPacket,
   IN UDP_END_POINT          *EndPoint,

MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Support.c

@@ -365,6 +365,7 @@ Mtftp4SendError (
 
 **/
 VOID
+EFIAPI
 Mtftp4OnPacketSent (
   IN NET_BUF                   *Packet,
   IN UDP_END_POINT             *EndPoint,

MdeModulePkg/Universal/Network/Mtftp4Dxe/Mtftp4Wrq.c

@@ -335,6 +335,7 @@ Mtftp4WrqHandleOack (
                                 MTFTP session.
 **/
 VOID
+EFIAPI
 Mtftp4WrqInput (
   IN NET_BUF                *UdpPacket,
   IN UDP_END_POINT          *EndPoint,