Add inital support for xiaomi-ysl front camera and s5k3p8sp

[barni2000]

This MR contains:

• initial support for s5k3p8sp in s5k2xx driver
• enable s5k3p8sp on ysl

TODO:

• ~minimalize initseq~ (It is mostly the minimal)
• ~find the correct link freq~ (700MHz is the correct link freq)
• ~check chip_id~

Config: xiaomi,ysl.txt

it should be renamed to xiaomi,ysl.ini