hikey-kernel: Update prebuilt kernel to 4.4.8 (956a9dd)
am: d6fbc6511f

* commit 'd6fbc6511f6169325205d0efb45d051eea8f9297':
  hikey-kernel: Update prebuilt kernel to 4.4.8 (956a9dd)

Change-Id: I8ccd5e37d81f83f7da2158c1f720aa3f5a765952