drm/i915/skl: Retrieve the frequency limits

v2: Use the new function, gen6_init_rps_frequencies() (Damien)

Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com> (v1)
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_pm.c

@@ -4031,6 +4031,8 @@ static void gen9_enable_rps(struct drm_device *dev)
 
 	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
 
+	gen6_init_rps_frequencies(dev);
+
 	I915_WRITE(GEN6_RPNSWREQ, 0xc800000);
 	I915_WRITE(GEN6_RC_VIDEO_FREQ, 0xc800000);