Update kernel headers to v3.18.3.

Bug: 19127803
Change-Id: I67fa0832322ddd0032d909476047578be052bcf2
diff --git a/libc/kernel/uapi/linux/i8k.h b/libc/kernel/uapi/linux/i8k.h
index cc5c16e..23b1c33 100644
--- a/libc/kernel/uapi/linux/i8k.h
+++ b/libc/kernel/uapi/linux/i8k.h
@@ -37,12 +37,13 @@
 #define I8K_FAN_LOW 1
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define I8K_FAN_HIGH 2
-#define I8K_FAN_MAX I8K_FAN_HIGH
+#define I8K_FAN_TURBO 3
+#define I8K_FAN_MAX I8K_FAN_TURBO
 #define I8K_VOL_UP 1
-#define I8K_VOL_DOWN 2
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define I8K_VOL_DOWN 2
 #define I8K_VOL_MUTE 4
 #define I8K_AC 1
 #define I8K_BATTERY 0
-#endif
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif