hikey-kernel: Update kernel prebuilt to v4.4.20 (ba3f656) am: 1634047d55
am: 18b674c6ac

Change-Id: Ia0e54a5fa3e7434c7c3cca730368758e8a1f0d09
diff --git a/Image-dtb b/Image-dtb
index a96acc7..43182ed 100755
--- a/Image-dtb
+++ b/Image-dtb
Binary files differ
diff --git a/hi6220-hikey.dtb b/hi6220-hikey.dtb
index d1dd3ad..263767a 100644
--- a/hi6220-hikey.dtb
+++ b/hi6220-hikey.dtb
Binary files differ