Clean up GD32 Ethernet timing and logs

Update the GD32 PHY code to use the current timer API (`gd32::Millis()` from `gd32_timers.h`), and tighten Ethernet debug output by fixing the timestamp wait format specifiers and switching the IGMP drop message to the interface-specific debug macro.

Author: vanvught

lib-network/src/emac/gd32/emac_eth.cpp

@@ -184,7 +184,7 @@ template <bool T> static void PtpFrameTransmit(uint32_t length) {
             timeout++;
         } while ((0 == tdes0_ttmss_flag) && (timeout < UINT32_MAX));
 
-        EMAC_DEBUG_PRINTF("timeout=%x %d", timeout, (dma_current_txdesc->status & ENET_TDES0_TTMSS));
+        EMAC_DEBUG_PRINTF("timeout=%x %u", static_cast<unsigned>(timeout), static_cast<unsigned>(dma_current_txdesc->status & ENET_TDES0_TTMSS));
 
         dma_current_txdesc->status &= ~ENET_TDES0_TTMSS; ///< Clear timestamp flag
 

lib-network/src/emac/gd32/emac_phy.cpp

@@ -27,7 +27,7 @@
 
 #include "emac/emac_phy.h"
 #include "emac/mmi.h"
-#include "gd32_millis.h"
+#include "gd32_timers.h"
 #include "emac/emac_debug.h"
 #include "gd32.h" // IWYU pragma: keep
 
@@ -148,10 +148,10 @@ bool Config(uint16_t address) {
      * IEEE spec.
      */
 
-    const auto kMillis = millis();
+    const auto kMillis = gd32::Millis();
     uint16_t value;
 
-    while (millis() - kMillis < 500U) {
+    while (gd32::Millis() - kMillis < 500U) {
         if (!phy::Read(address, emac::mmi::REG_BMCR, value)) {
             DEBUG_PUTS("PHY status read failed");
             EMAC_PHY_DEBUG_EXIT();

lib-network/src/iface/ethernet.cpp

@@ -66,7 +66,7 @@ void EthernetInput(const uint8_t* buffer, [[maybe_unused]] uint32_t length) {
             if ((kEther->dst[0] == network::ethernet::kIP4MulticastAddr0) && (kEther->dst[1] == network::ethernet::kIP4MulticastAddr1) && (kEther->dst[2] == network::ethernet::kIP4MulticastAddr2)) {
                 if (!network::igmp::LookupGroup(network::MemcpyIp(kIp4->ip4.dst))) {
                     emac::eth::FreePkt();
-                    DEBUG_PUTS("IGMP not for us");
+                    NETWORK_IFACE_DEBUG_PUTS("IGMP not for us");
                     return;
                 }
             }