vatrace: refine VAEncPackedHeaderParameterBufferType format
vatrace: refine VAEncPackedHeaderParameterBufferType format

Change-Id: I1794a9c09a88b61d7abce970d7cb9a8f101162c6
Signed-off-by: Austin Yuan <f447c34e4ebcef84a81b40a8d4dbc448a14e5570@intel.com>
(cherry picked from commit 4853e4a3a6cc5218e032a19d729096862db82bc6)

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