i965: Emit PIPE_CONTROL with ISP bit on older platforms.

Emit it on all platforms since gen7.

Signed-off-by: Rafael Antognolli <rafael.antognolli@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

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

@@ -766,7 +766,7 @@ brw_finish_batch(struct brw_context *brw)
       }
 
       /* Do not restore push constant packets during context restore. */
-      if (devinfo->gen == 10)
+      if (devinfo->gen >= 7)
          gen10_emit_isp_disable(brw);
    }