microblaze: Enable axi emac via Kconfig

Enable driver by default for all platforms.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

configs/microblaze-generic_defconfig

@@ -11,6 +11,7 @@ CONFIG_CMD_GPIO=y
 CONFIG_SPL_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_DM_ETH=y
+CONFIG_XILINX_AXIEMAC=y
 CONFIG_XILINX_EMACLITE=y
 CONFIG_SYS_NS16550=y
 CONFIG_XILINX_UARTLITE=y

include/configs/microblaze-generic.h

@@ -42,11 +42,7 @@
 
 /* ethernet */
 #undef CONFIG_SYS_ENET
-#if defined(CONFIG_XILINX_EMACLITE)
-# define CONFIG_SYS_ENET
-#endif
-#if defined(XILINX_AXIEMAC_BASEADDR)
-# define CONFIG_XILINX_AXIEMAC	1
+#if defined(CONFIG_XILINX_EMACLITE) || defined(CONFIG_XILINX_AXIEMAC)
 # define CONFIG_SYS_ENET
 #endif