Nightmare Kernel v1.2

Changelog:

• Merge linux tag v4.4.264

• Merge tag 'LA.UM.7.2.r1-09600-sdm660.0' for WiFi drivers

• Update compiler to latest Proton clang 13 build date 20210327

• Fix issue "Phone is starting" in some roms

• Better idle drain

• UPSTREAM: sched/rt: Disable RT_RUNTIME_SHARE by default

• soc: qcom: subsystem_restart: Prevent kernel panic caused by modem crash

• and misc changes