Update to v5.11 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.11

Test: Built cuttlefish and flame images. Ran bionic unit tests on both.
Change-Id: Ie60337aafad4bda55af99b6c8fe9f56bf2fa787f
diff --git a/libc/kernel/uapi/linux/fscrypt.h b/libc/kernel/uapi/linux/fscrypt.h
index 168b331..ca42eb3 100644
--- a/libc/kernel/uapi/linux/fscrypt.h
+++ b/libc/kernel/uapi/linux/fscrypt.h
@@ -28,13 +28,11 @@
 #define FSCRYPT_POLICY_FLAG_DIRECT_KEY 0x04
 #define FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64 0x08
 #define FSCRYPT_POLICY_FLAG_IV_INO_LBLK_32 0x10
-#define FSCRYPT_POLICY_FLAGS_VALID 0x1F
 #define FSCRYPT_MODE_AES_256_XTS 1
 #define FSCRYPT_MODE_AES_256_CTS 4
 #define FSCRYPT_MODE_AES_128_CBC 5
 #define FSCRYPT_MODE_AES_128_CTS 6
 #define FSCRYPT_MODE_ADIANTUM 9
-#define __FSCRYPT_MODE_MAX 9
 #define FSCRYPT_POLICY_V1 0
 #define FSCRYPT_KEY_DESCRIPTOR_SIZE 8
 struct fscrypt_policy_v1 {
@@ -131,7 +129,7 @@
 #define FS_POLICY_FLAGS_PAD_32 FSCRYPT_POLICY_FLAGS_PAD_32
 #define FS_POLICY_FLAGS_PAD_MASK FSCRYPT_POLICY_FLAGS_PAD_MASK
 #define FS_POLICY_FLAG_DIRECT_KEY FSCRYPT_POLICY_FLAG_DIRECT_KEY
-#define FS_POLICY_FLAGS_VALID FSCRYPT_POLICY_FLAGS_VALID
+#define FS_POLICY_FLAGS_VALID 0x07
 #define FS_ENCRYPTION_MODE_INVALID 0
 #define FS_ENCRYPTION_MODE_AES_256_XTS FSCRYPT_MODE_AES_256_XTS
 #define FS_ENCRYPTION_MODE_AES_256_GCM 2