Lumi-Celestia

Changelog:

Full changelog: https://github.com/IzumiYouka/kernel_xiaomi_sm8250-firefly/compare/ignis...celestia

• Removed WALT, switched to PELT (16ms half-life)
• Backported EEVDF with delayed dequeue
• Reworked load balancing and schedutil DVFS headroom
• Added CASS, Uclamp Assist, CPUSet Assist, SBalance IRQ balancer
• Added Frequency Invariance Engine and thermal pressure tracking
• Updated energy model
• zRAM/zsmalloc backported from 6.x (lz4, zstd, dictionary, recompression)
• Updated LZ4 and zstd, enabled f2fs compression
• Large lockdep/rwsem/qspinlock backport, updated binder
• Added NTSYNC driver
• Memory management and page cache (XArray) improvements
• Switched TCP congestion control to Westwood+
• Ported GPU pwrlevel table with mild undervolt, KGSL/SDE optimizations
• Battery charging and JEITA fixes
• ThinLTO, Polly and MLGO build optimizations
• Many upstream security and stability fixes