Updated the kernel to the latest version from LineageOS [1] (branch
`cm-14.1`), copied their configuration file and updated it according
to `pmbootstrap kconfig check`. Previous kernel was from `cm-12.1`
branch.

Fixed firmware package. Switched firmware source to
LineageOS/TheMuppets and install only the Wi-Fi firmware, but into the
correct directory. Previously all available firmware was simply copied
into wrong directories.

[1] https://github.com/LineageOS/android_kernel_htc_msm8960

[ci:skip-build] already built successfully in CI