Update to v5.5 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.5

Test: Boots on walleye.
Test: Ran bionic-unit-tests on walleye.
Test: Boots on cuttlefish.
Test: Ran bionic-unit-tests on cuttlefish.
Change-Id: I57387d3c31e0ba5ad125ffe291cecf365c7b374e
Merged-In: I57387d3c31e0ba5ad125ffe291cecf365c7b374e
diff --git a/libc/kernel/uapi/drm/v3d_drm.h b/libc/kernel/uapi/drm/v3d_drm.h
index 0b6b94f..cdc2cf5 100644
--- a/libc/kernel/uapi/drm/v3d_drm.h
+++ b/libc/kernel/uapi/drm/v3d_drm.h
@@ -38,6 +38,7 @@
 #define DRM_IOCTL_V3D_GET_BO_OFFSET DRM_IOWR(DRM_COMMAND_BASE + DRM_V3D_GET_BO_OFFSET, struct drm_v3d_get_bo_offset)
 #define DRM_IOCTL_V3D_SUBMIT_TFU DRM_IOW(DRM_COMMAND_BASE + DRM_V3D_SUBMIT_TFU, struct drm_v3d_submit_tfu)
 #define DRM_IOCTL_V3D_SUBMIT_CSD DRM_IOW(DRM_COMMAND_BASE + DRM_V3D_SUBMIT_CSD, struct drm_v3d_submit_csd)
+#define DRM_V3D_SUBMIT_CL_FLUSH_CACHE 0x01
 struct drm_v3d_submit_cl {
   __u32 bcl_start;
   __u32 bcl_end;
@@ -51,7 +52,7 @@
   __u32 qts;
   __u64 bo_handles;
   __u32 bo_handle_count;
-  __u32 pad;
+  __u32 flags;
 };
 struct drm_v3d_wait_bo {
   __u32 handle;
@@ -79,6 +80,7 @@
   DRM_V3D_PARAM_V3D_CORE0_IDENT2,
   DRM_V3D_PARAM_SUPPORTS_TFU,
   DRM_V3D_PARAM_SUPPORTS_CSD,
+  DRM_V3D_PARAM_SUPPORTS_CACHE_FLUSH,
 };
 struct drm_v3d_get_param {
   __u32 param;