surfaceflinger: Reimplement hwrotation

        int orientation, int w, int h, Transform* tr)

{

    uint32_t flags = 0;

    char value[PROPERTY_VALUE_MAX];

    property_get("ro.sf.hwrotation", value, "0");

    int additionalRot = atoi(value);

    if (additionalRot) {

        additionalRot /= 90;

        if (orientation == DisplayState::eOrientationUnchanged) {

            orientation = additionalRot;

        } else {

            orientation += additionalRot;

            orientation %= 4;

        }

    }

    switch (orientation) {

    case DisplayState::eOrientationDefault:

        flags = Transform::ROT_0;