1. Move codec_type detection code to vcodec_service.
Only vcodec_service needs to detect vcodec_type. Mpp_service will
report this flag from kernel.
2. Remove kernel device detection code when soc type not detected.
3. Add mpp_soc.h for soc definition.
Change-Id: Ic83897bddbcf0fceb0c5d19a05491f75231092c1
Signed-off-by: Herman Chen <herman.chen@rock-chips.com>