drm/i915/perf: disable clk ratio reports on gen9

We're doing this on all Gen9 based platforms, let's just check the gen
rather than listing every single platforms.
Signed-off-by: NLionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: NMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170918112124.29541-2-lionel.g.landwerlin@intel.com

drivers/gpu/drm/i915/i915_perf.c

@@ -1850,8 +1850,7 @@ static int gen8_enable_metric_set(struct drm_i915_private *dev_priv,
 	 * be read back from automatically triggered reports, as part of the
 	 * RPT_ID field.
 	 */
-	if (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv) ||
-	    IS_KABYLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
+	if (IS_GEN9(dev_priv)) {
 		I915_WRITE(GEN8_OA_DEBUG,
 			   _MASKED_BIT_ENABLE(GEN9_OA_DEBUG_DISABLE_CLK_RATIO_REPORTS |
 					      GEN9_OA_DEBUG_INCLUDE_CLK_RATIO));