https://bugzilla.kernel.org/show_bug.cgi?id=153401
--- Comment #6 from Lv Zheng ---
4.6.5 and 4.7.0 can only be found in the stable kernel.
So you need to clone the stable tree for doing the git bisect:
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/
They can be found as tag
https://bugzilla.kernel.org/show_bug.cgi?id=153511
Bug ID: 153511
Summary: Much longer boot compared to kernel 4.4 and 4.6
Product: ACPI
Version: 2.5
Kernel Version: 4.7
Hardware: All
OS: Linux
Tree: Mainline