oneplus/sm8250_t_13.0.0_op8 source code is incomplete

[luk1337]

See the following .gitignore files: https://github.com/OnePlusOSS/android_kernel_modules_and_devicetree_oneplus_sm8250/blob/oneplus/sm8250_t_13.0.0_op8/kernel/msm-4.19/techpack/display/.gitignore
https://github.com/OnePlusOSS/android_kernel_oneplus_sm8250/blob/oneplus/sm8250_t_13.0.0_op8/.gitignore#L145-L150

[luk1337]

@OnePlusOSSAdmin pls don't ignore me this time

[YumeMichi]

@OnePlusOSSAdmin Pls push missing parts like you did before.
1d242bf

[ppajda]

Cmon @OnePlusOSSAdmin, we are still waiting.