net: cosmetic: Un-typedef IP_t

Rename IP header related things to IP_UDP. The existing definition
of IP_t includes UDP header, so name it to accurately describe the
structure.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/net/bootp.h b/net/bootp.h
index bf4e875..1cf9a02 100644
--- a/net/bootp.h
+++ b/net/bootp.h
@@ -52,7 +52,7 @@
 };
 
 #define BOOTP_HDR_SIZE	sizeof(struct Bootp_t)
-#define BOOTP_SIZE	(ETHER_HDR_SIZE + IP_HDR_SIZE + BOOTP_HDR_SIZE)
+#define BOOTP_SIZE	(ETHER_HDR_SIZE + IP_UDP_HDR_SIZE + BOOTP_HDR_SIZE)
 
 /**********************************************************************/
 /*