i965: Remove BRW_NEW_NR_VS_SURFACES dirty bit from brw_vs_surfaces.

i965: Remove BRW_NEW_NR_VS_SURFACES dirty bit from brw_vs_surfaces.

brw_vs_surfaces _produces_ the BRW_NEW_NR_VS_SURFACES dirty bit, so it
makes no sense for it to subscribe to it.

Fixes an assertion failure in many piglit tests when INTEL_DEBUG is set:
  brw_state_upload.c:484: void brw_upload_state(struct brw_context *):
  Assertion `!check_state(&examined, &generated)' failed.

One such piglit test is vs-uniform-array-mat2-col-rd.shader_test.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Paul Berry <stereotype441@gmail.com>