Update to v5.8 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.8

Test: NA
Change-Id: I2231c877589820fc09800a200cf4ac62ba74b04c
diff --git a/libc/kernel/uapi/drm/i915_drm.h b/libc/kernel/uapi/drm/i915_drm.h
index 41b4dda..001ebd5 100644
--- a/libc/kernel/uapi/drm/i915_drm.h
+++ b/libc/kernel/uapi/drm/i915_drm.h
@@ -836,6 +836,8 @@
   DRM_I915_PERF_PROP_OA_FORMAT,
   DRM_I915_PERF_PROP_OA_EXPONENT,
   DRM_I915_PERF_PROP_HOLD_PREEMPTION,
+  DRM_I915_PERF_PROP_GLOBAL_SSEU,
+  DRM_I915_PERF_PROP_POLL_OA_PERIOD,
   DRM_I915_PERF_PROP_MAX
 };
 struct drm_i915_perf_open_param {