Fix bugs

• Fixed issue #6 and #7
• fix a syntax error closing of fi in post-fs-data.sh

Core changes

• Changed skiavkthreaded to skiavk
  • forcing to skiavkthreaded is useless, it will automatically change threading behaviour based on device support
• Disabled SPC, focus on platform control instead of vendor

Removed the following lines

• persist.sys.dynamicbuffer.max_adjust_num (this is probably the main cause of the bug reported)
• persist.sys.mi.prerender
• debug.renderengine.blur_algorithm
• persist.sys.use_boot_compact
• persist.sys.enable_rtmode