gallium: squash-merge of gallium screen context Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com> Author: Keith Whitwell <keithw@vmware.com>