Update to v5.15 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.15

Test: Builds, and ran bionic unit tests on flame.
Change-Id: I86901ea6d89fb0f7384b90a47bef35d194083c24
diff --git a/libc/kernel/uapi/linux/cec.h b/libc/kernel/uapi/linux/cec.h
index 238fa0a..b90dc49 100644
--- a/libc/kernel/uapi/linux/cec.h
+++ b/libc/kernel/uapi/linux/cec.h
@@ -262,7 +262,7 @@
 #define CEC_OP_REC_SEQ_WEDNESDAY 0x08
 #define CEC_OP_REC_SEQ_THURSDAY 0x10
 #define CEC_OP_REC_SEQ_FRIDAY 0x20
-#define CEC_OP_REC_SEQ_SATERDAY 0x40
+#define CEC_OP_REC_SEQ_SATURDAY 0x40
 #define CEC_OP_REC_SEQ_ONCE_ONLY 0x00
 #define CEC_MSG_CLEAR_DIGITAL_TIMER 0x99
 #define CEC_MSG_CLEAR_EXT_TIMER 0xa1