display: Enable triple framebuffers

Change-Id: I323c10b939277477f724c2d0a20f9c6da4899481
diff --git a/libgralloc/fb_priv.h b/libgralloc/fb_priv.h
index 677d1c1..46b119f 100644
--- a/libgralloc/fb_priv.h
+++ b/libgralloc/fb_priv.h
@@ -20,8 +20,7 @@
 #include <linux/fb.h>
 
 #define NUM_FRAMEBUFFERS_MIN  2
-//XXX: Enable triple framebuffers
-#define NUM_FRAMEBUFFERS_MAX  2
+#define NUM_FRAMEBUFFERS_MAX  3
 
 #define NO_SURFACEFLINGER_SWAPINTERVAL
 #define COLOR_FORMAT(x) (x & 0xFFF) // Max range for colorFormats is 0 - FFF