net: tftpput: Rename TFTP to TFTPGET

This is a better name for this protocol. Also remove the typedef to keep
checkpatch happy, and move zeroing of NetBootFileXferSize a little
earlier since TFTPPUT will need to change this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/hymod/fetch.c b/board/hymod/fetch.c
index e121d55..f5f9582 100644
--- a/board/hymod/fetch.c
+++ b/board/hymod/fetch.c
@@ -55,7 +55,7 @@
 	load_addr = addr;
 	NetBootFileXferSize = 0;
 
-	if (NetLoop (TFTP) == 0) {
+	if (NetLoop(TFTPGET) == 0) {
 		printf ("tftp transfer of file '%s' failed\n", fn);
 		return (0);
 	}