Update to v6.8 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-6.8

Test: Builds and bionic unit tests pass on raven.
Test: Able to log in to an Android GO 32 bit device.
Change-Id: I0022cdb20c19726f526acaab2866f1e25794b77e
diff --git a/libc/kernel/uapi/drm/drm_mode.h b/libc/kernel/uapi/drm/drm_mode.h
index f7b65b2..9e6296c 100644
--- a/libc/kernel/uapi/drm/drm_mode.h
+++ b/libc/kernel/uapi/drm/drm_mode.h
@@ -357,6 +357,9 @@
 struct drm_color_ctm {
   __u64 matrix[9];
 };
+struct drm_color_ctm_3x4 {
+  __u64 matrix[12];
+};
 struct drm_color_lut {
   __u16 red;
   __u16 green;
@@ -483,6 +486,10 @@
   __s32 x2;
   __s32 y2;
 };
+struct drm_mode_closefb {
+  __u32 fb_id;
+  __u32 pad;
+};
 #ifdef __cplusplus
 }
 #endif