vaimage: extend VAImage to support 4 planes
vaimage: extend VAImage to support 4 planes

Change-Id: I1090f6cb4934cefd4f730e080e5f22ae17f51903
Signed-off-by: Austin Yuan <f447c34e4ebcef84a81b40a8d4dbc448a14e5570@intel.com>

android-ia/hardware_intel_libva,halleyzhao/libva-fdo,CyanogenMod/android_hardware_intel_libva,android-ia/hardware_intel_libva,CyanogenMod/android_hardware_intel_libva,halleyzhao/libva-fdo,android-ia/hardware_intel_libva,CyanogenMod/android_hardware_intel_libva,halleyzhao/libva-fdo