Update to 6.12-rc2

• Update to 6.12-rc2:
  • Drop patches applied upstream:
    • "tools/rtla: Fix installation from out-of-tree build"
  • Refresh patches:
    • Update "Revert "tools build: Clean CFLAGS and LDFLAGS for fixdep"" and "fixdep: Allow overriding HOSTCC and HOSTLD" to use $(SILENT_MAKE)
    • Adjust context in "fanotify: Taint on use of FANOTIFY_ACCESS_PERMISSIONS"
    • Adjust context in "kbuild: Look for module.lds under arch directory too"
    • Adjust context in "Include package version along with kernel release in stack traces"
    • Adjust context in "arm64: add kernel config option to lock down when in Secure Boot mode"
    • Adjust context in "efi: Lock down the kernel if booted in secure boot mode"
    • Adjust context in "security,perf: Allow further restriction of perf_event_open"
    • Adjust context in "intel-iommu: Add option to exclude integrated GPU only"
• [rt] Update to 6.12-rc1-rt2
• d/rules.d/certs: Add newly required include directory to CPPFLAGS
• libcpupower: Update symbols file for change in 6.12
• d/config: Update with the help of kconfigeditor2:
  • i2c: Remove I2C_COMPAT
  • input/touchscreen: Remove TOUCHSCREEN_MCS5000
  • mm: Enable Z3FOLD_DEPRECATED instead of Z3FOLD
  • [amd64] sound/soc/intel: Enable AVS drivers to replace old Skylake SoC drivers:
    • Enable SND_SOC_INTEL_AVS_MACH_RT286 and SND_SOC_INTEL_AVS_MACH_RT5514
    • Leave SND_SOC_INTEL_AVS_MACH_MAX98357A disabled until we know it's safe
    • Remove SND_SOC_INTEL_SKYLAKE, SND_SOC_INTEL_CML_LP, SND_SOC_INTEL_SKYLAKE_HDAUDIO_CODEC, SND_SOC_INTEL_SKL_*_MACH, SND_SOC_INTEL_KBL_*_MACH