[xorg-x11-drv-mach64/f18] mach64-6.9.3-shadowfb.patch: Allow Render even when doing ShadowFB.

[Adam Jackson]

Summary of changes:

  068b5b8... mach64-6.9.3-shadowfb.patch: Allow Render even when doing S (*)

(*) This commit already existed in another branch; no separate mail sent