Update to v6.6 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-6.6

Test: Builds and bionic unit tests pass on raven.
Test: Able to log in to an Android GO 32 bit device.
Change-Id: Ib5ff5a23f382721d98d1e428a295c6794b190d8d
diff --git a/libc/kernel/uapi/linux/dlm_plock.h b/libc/kernel/uapi/linux/dlm_plock.h
index 332397b..80eff88 100644
--- a/libc/kernel/uapi/linux/dlm_plock.h
+++ b/libc/kernel/uapi/linux/dlm_plock.h
@@ -27,6 +27,7 @@
   DLM_PLOCK_OP_LOCK = 1,
   DLM_PLOCK_OP_UNLOCK,
   DLM_PLOCK_OP_GET,
+  DLM_PLOCK_OP_CANCEL,
 };
 #define DLM_PLOCK_FL_CLOSE 1
 struct dlm_plock_info {