main/lk2nd-msm8953: upgrade to 3.4.0

Changelog

• Added support for Xiaomi Redmi S2/Y2 (ysl)
• Added support for Huawei Maimang 5 / Nova (Plus) / G9 (Plus)
• Added support for Redmi 6 Pro (xiaomi-sakura)
• Delay arch_disable_mmu() (fixes some crashes on boot)