minui: bring back custom font support

Change-Id: I6cb97b236ff8ada46d270e99ab37656f5f1b73f8
diff --git a/minui/graphics.cpp b/minui/graphics.cpp
index 76ef56e..eceaeee 100644
--- a/minui/graphics.cpp
+++ b/minui/graphics.cpp
@@ -31,7 +31,12 @@
 
 #include <time.h>
 
+#ifdef BOARD_USE_CUSTOM_RECOVERY_FONT
+#include BOARD_USE_CUSTOM_RECOVERY_FONT
+#else
 #include "font_10x18.h"
+#endif
+
 #include "minui.h"
 #include "graphics.h"