Remove obsolete libffi

Change-Id: I092e643be8bde9dbf00dd0d3314275e1ac3db409
diff --git a/target/board/generic_mips/device.mk b/target/board/generic_mips/device.mk
index b182c4c..fe64bcb 100644
--- a/target/board/generic_mips/device.mk
+++ b/target/board/generic_mips/device.mk
@@ -31,5 +31,4 @@
 PRODUCT_PACKAGES := \
     audio.primary.goldfish \
     power.goldfish \
-    vibrator.goldfish \
-    libffi
+    vibrator.goldfish
diff --git a/target/board/generic_mips64/device.mk b/target/board/generic_mips64/device.mk
index 58fe976..aca8d24 100644
--- a/target/board/generic_mips64/device.mk
+++ b/target/board/generic_mips64/device.mk
@@ -30,5 +30,4 @@
 
 PRODUCT_PACKAGES := \
     audio.primary.goldfish \
-    power.goldfish \
-    libffi
+    power.goldfish