vpp: fix vaQueryVideoProcFilterCaps() prototype.
vpp: fix vaQueryVideoProcFilterCaps() prototype.

01org/iotg-lin-gfx-libva,gbeauchesne/libva,pma1/libva,zzhhui/libva,01org/iotg-lin-gfx-libva,chenxianqin/vaapi-libva,gbeauchesne/libva,pma1/libva,01org/libva-cros,chenxianqin/vaapi-libva,zzhhui/libva,chenxianqin/vaapi-libva,pma1/libva,01org/libva-cros,zzhhui/libva,gbeauchesne/libva,01org/iotg-lin-gfx-libva,01org/libva-cros