Update kernel to builds 6704363

Mainline is currently building many unnecessary kernel modules, so those
were manually removed from this commit.

Test: treehugger
Bug: 161563956
Change-Id: I42720892b037379b7027d18f08da21f1d2f3acb5
4 files changed
tree: f8360bd0640b8c83ae826071efd8f28d92472cbf
  1. System.map
  2. kernel-mainline
  3. kernel-mainline-gz
  4. kernel-mainline-lz4