hikey-kernel: Update kernel prebuilt with USB audio support (664e6d0)

664e6d0 hikey_defconfig: Enable USB audio support

Change-Id: Icc05587e5b5295ab94e773db32c04bba95593819
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/Image-dtb b/Image-dtb
index 3d249f1..783f33d 100755
--- a/Image-dtb
+++ b/Image-dtb
Binary files differ