drm/i915: Simplify cmd-parser DISPATCH_SECURE check

i915_needs_cmd_parser already checks that for us.
Suggested-by: NMika Kuoppala <mika.kuoppala@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -1559,8 +1559,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 		 * don't want that set when the command parser is
 		 * enabled.
 		 */
-		if (USES_PPGTT(dev))
-			dispatch_flags |= I915_DISPATCH_SECURE;
+		dispatch_flags |= I915_DISPATCH_SECURE;
 
 		exec_start = 0;
 	}