PPP, CORE, Removed (*datainput) from struct protent if not used

Data input is only used by CCP and ECP, which are not supported at this time,
remove this entry from struct protent to save some flash.

src/netif/ppp/ccp.c

@@ -192,7 +192,9 @@ const struct protent ccp_protent = {
 #if PRINTPKT_SUPPORT
     ccp_printpkt,
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
     ccp_datainput,
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
     "CCP",
     "Compressed",

src/netif/ppp/chap-new.c

@@ -651,7 +651,9 @@ const struct protent chap_protent = {
 #if PRINTPKT_SUPPORT
 	chap_print_pkt,
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
 	NULL,		/* datainput */
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
 	"CHAP",		/* name */
 	NULL,		/* data_name */

src/netif/ppp/eap.c

@@ -123,7 +123,9 @@ const struct protent eap_protent = {
 #if PRINTPKT_SUPPORT
 	eap_printpkt,		/* print a packet in readable form */
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
 	NULL,			/* process a received data packet */
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
 	"EAP",			/* text name of protocol */
 	NULL,			/* text name of corresponding data protocol */

src/netif/ppp/ecp.c

@@ -111,7 +111,9 @@ const struct protent ecp_protent = {
 #if PRINTPKT_SUPPORT
     ecp_printpkt,
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
     NULL, /* ecp_datainput, */
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
     "ECP",
     "Encrypted",

src/netif/ppp/ipcp.c

@@ -290,7 +290,9 @@ const struct protent ipcp_protent = {
 #if PRINTPKT_SUPPORT
     ipcp_printpkt,
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
     NULL,
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
     "IPCP",
     "IP",

src/netif/ppp/ipv6cp.c

@@ -283,7 +283,9 @@ const struct protent ipv6cp_protent = {
 #if PRINTPKT_SUPPORT
     ipv6cp_printpkt,
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
     NULL,
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
     "IPV6CP",
     "IPV6",

src/netif/ppp/lcp.c

@@ -284,7 +284,9 @@ const struct protent lcp_protent = {
 #if PRINTPKT_SUPPORT
     lcp_printpkt,
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
     NULL,
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
     "LCP",
     NULL,

src/netif/ppp/upap.c

@@ -101,7 +101,9 @@ const struct protent pap_protent = {
 #if PRINTPKT_SUPPORT
     upap_printpkt,
 #endif /* PRINTPKT_SUPPORT */
+#if PPP_DATAINPUT
     NULL,
+#endif /* PPP_DATAINPUT */
 #if PRINTPKT_SUPPORT
     "PAP",
     NULL,