microblaze: Enable TFTP put command

Signed-off-by: Stephan Linz <linz@li-pro.net>

include/configs/microblaze-generic.h

@@ -255,6 +255,7 @@
 #else
 # define CONFIG_CMD_PING
 # define CONFIG_CMD_DHCP
+# define CONFIG_CMD_TFTPPUT
 #endif
 
 #if defined(CONFIG_SYSTEMACE)