boards/same54-xpro: add EUI-48 provider

Use the on-board AT24MAC chip as an EUI-48 provider.

boards/same54-xpro/Makefile.dep

@@ -1,3 +1,7 @@
 ifneq (,$(filter saul_default,$(USEMODULE)))
   USEMODULE += saul_gpio
 endif
+
+ifneq (,$(filter eui_provider,$(USEMODULE)))
+  USEMODULE += at24mac
+endif

boards/same54-xpro/include/board.h

@@ -21,6 +21,7 @@
 #define BOARD_H
 
 #include "cpu.h"
+#include "at24mac.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -43,6 +44,22 @@ extern "C" {
 #define ATCA_PARAM_I2C           I2C_DEV(1)
 /** @} */
 
+/**
+ * @brief    AT24Mac provides a EUI-48
+ */
+static inline int _at24mac_get_eui48(const void *arg, eui48_t *addr)
+{
+    return at24mac_get_eui48((uintptr_t)arg, addr);
+}
+
+/**
+ * @name    EUI-48 sources on the board
+ *          AT24Mac is present on the board
+ * @{
+ */
+#define EUI48_PROVIDER_FUNC   _at24mac_get_eui48
+/** @} */
+
 /**
  * @name   LED pin definitions and handlers
  * @{