1. Add rc model in when force skip frm
2. Fix ref frm error when force pskip
3. Disable pskip when cfg force idr
4. Support pskip frm as ref frm
5. Support force skip frm as is_ref or non_ref
Change-Id: Ib138ab75a9df2c4521cb376e3a3d7fd30565ecd9
Signed-off-by: Yanjun Liao <yanjun.liao@rock-chips.com>