STRIX kernel for Xiaomi Redmi Note 6 Pro (tulip)

Changelog v2.7 :

• Merge stable linux v4.4.237.
• Merge CAF tag LA.UM.8.2.r2-02700-sdm660.0.
• Fix LZ4 compress speed.
• Set default ZRAM compress to LZ4.
• OC i2c bus clock.
• Update SchedTune assist from v2 to v3.
• Tweak SchedTune assist & cpuset assist.
• Disable CPU boost from CAF.
• Adreno GPU: Increase maximum ringbuffer inflight & bus data limit.
• Enable RCU boost
• Update a bit of power driver from Lineage-17.1 base kernel.
• Add dt2w support on ROMs that don't use device tree common.
• Add sleep time to timestamps.
• Disable IPC logging entirely.
• Add serial num driver (useful for MIUI base ROMs).
• Fix memory leaks in sched core and ION.
• Compile use O3.
• Compile with GCC 10.2.0 elf baremetal + LTO + LD dead code elimination + optimized inlining.