i965: Re-disable the VS.

There's stuff that needs to happen in the ISA before we can play with
actually executing anything in the VS.

src/mesa/drivers/dri/i965/brw_defines.h

@@ -796,7 +796,7 @@
 # define GEN6_VE0_INDEX_SHIFT		26
 # define BRW_VE0_FORMAT_SHIFT		16
 # define BRW_VE0_VALID			(1 << 26)
-# define GEN6_VE0_VALID			(1 << 25)
+# define GEN6_VE0_VALID			(0 << 25)
 # define BRW_VE0_SRC_OFFSET_SHIFT	0
 # define BRW_VE1_COMPONENT_NOSTORE	0
 # define BRW_VE1_COMPONENT_STORE_SRC	1

src/mesa/drivers/dri/i965/gen6_vs_state.c

@@ -56,8 +56,7 @@ upload_vs_state(struct brw_context *brw)
 	     (brw->vs.prog_data->urb_read_length << GEN6_VS_URB_READ_LENGTH_SHIFT) |
 	     (0 << GEN6_VS_URB_ENTRY_READ_OFFSET_SHIFT));
    OUT_BATCH((0 << GEN6_VS_MAX_THREADS_SHIFT) |
-	     GEN6_VS_STATISTICS_ENABLE|
-	     GEN6_VS_ENABLE);
+	     GEN6_VS_STATISTICS_ENABLE);
    ADVANCE_BATCH();
 
    intel_batchbuffer_emit_mi_flush(intel->batch);