NUVOTON: EMAC: Fix undeclared function mbed_error_printf

ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

Author: ccli8

connectivity/drivers/emac/TARGET_NUVOTON_EMAC/TARGET_M460/m460_eth.c

@@ -20,6 +20,7 @@
 //#include <stdbool.h>
 #include "m460_eth.h"
 #include "mbed_toolchain.h"
+#include "mbed_interface.h"
 //#define NU_TRACE
 #include "numaker_eth_hal.h"
 

connectivity/drivers/emac/TARGET_NUVOTON_EMAC/TARGET_M480/m480_eth.c

@@ -20,6 +20,7 @@
 #include <stdbool.h>
 #include "m480_eth.h"
 #include "mbed_toolchain.h"
+#include "mbed_interface.h"
 //#define NU_TRACE
 #include "numaker_eth_hal.h"
 

connectivity/drivers/emac/TARGET_NUVOTON_EMAC/TARGET_NUC472/nuc472_eth.c

@@ -20,6 +20,7 @@
 #include <stdbool.h>
 #include "nuc472_eth.h"
 #include "mbed_toolchain.h"
+#include "mbed_interface.h"
 //#define NU_TRACE
 #include "numaker_eth_hal.h"