microblaze: Wire up axi_ethernet driver initialization

Initialize axi_ethernet driver.

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/include/configs/microblaze-generic.h b/include/configs/microblaze-generic.h
index 09ff7c4..6b3fd76 100644
--- a/include/configs/microblaze-generic.h
+++ b/include/configs/microblaze-generic.h
@@ -68,6 +68,10 @@
 # define CONFIG_XILINX_LL_TEMAC		1
 # define CONFIG_SYS_ENET
 #endif
+#if defined(XILINX_AXIEMAC_BASEADDR)
+# define CONFIG_XILINX_AXIEMAC	1
+# define CONFIG_SYS_ENET
+#endif
 
 #undef ET_DEBUG