Draft: Port Redmi Note 3 Pro (kenzo) to mainline and add linux-postmarketos-qcom-msm8956

This MR add mainline support for Redmi Note 3 Pro (kenzo) and new kernel package for msm8956/msm8976 SoCs.

Whats is working:

• GPU
• WiFi
• SimpleDRM
• USB
• Keys
• Charging/Battery (charging is slow)
• Touchscreen (Only atmel mxt is supported at the moment)
• SD Card

Issues:

• Sometimes boot stuck (Workaround go in recovery, next reboot will be fine)

For xiaomi-kenzo custom lk2nd build will needed with this PR https://github.com/msm8916-mainline/lk2nd/pull/384 for make cpufreq work.`

This will be draft until kernel stability issues are fixed.