drm/i915/perf: Skip the i915_perf_init for dg2

i915_perf is not enabled for dg2 yet, hence skip the feature
initialization.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
cc: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220215053115.6023-1-ramalingam.c@intel.com

drivers/gpu/drm/i915/i915_perf.c

@@ -4332,6 +4332,10 @@ void i915_perf_init(struct drm_i915_private *i915)
 
 	/* XXX const struct i915_perf_ops! */
 
+	/* i915_perf is not enabled for DG2 yet */
+	if (IS_DG2(i915))
+		return;
+
 	perf->oa_formats = oa_formats;
 	if (IS_HASWELL(i915)) {
 		perf->ops.is_valid_b_counter_reg = gen7_is_valid_b_counter_addr;