config: Set debug.sf.auto_latch_unsignaled to 0.

Need to explicitly set auto_latch_unsignaled property to
disabled state to keep latch-unsignaled as the default 
behavior.

Change-Id: I3856caaf0a68e7e720819f25338d1eb9196f56b0
diff --git a/config/display-product.mk b/config/display-product.mk
index 4990265..41df82f 100644
--- a/config/display-product.mk
+++ b/config/display-product.mk
@@ -54,6 +54,7 @@
     debug.sf.hw=0 \
     debug.egl.hw=0 \
     debug.sf.latch_unsignaled=1 \
+    debug.sf.auto_latch_unsignaled=0 \
     debug.mdpcomp.logs=0 \
     vendor.gralloc.disable_ubwc=0 \
     vendor.gralloc.enable_logs=0 \