Update to kernel headers v4.9.3.
Test: Built arm, arm64, x86, x86_64 targets.
Test: Booted on angler, and ran bionic unit tests (32 bit and 64 bit).
Change-Id: I14a8dcbea11b41f83431eabed6590cd25af07b1d
diff --git a/libc/kernel/uapi/linux/serial_reg.h b/libc/kernel/uapi/linux/serial_reg.h
index 570bbed..938318a 100644
--- a/libc/kernel/uapi/linux/serial_reg.h
+++ b/libc/kernel/uapi/linux/serial_reg.h
@@ -304,5 +304,8 @@
#define UART_FCTR_EXAR_TRGD 0xc0
#define UART_EXAR_TXTRG 0x0a
#define UART_EXAR_RXTRG 0x0b
-#endif
+#define UART_ALTR_AFR 0x40
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define UART_ALTR_EN_TXFIFO_LW 0x01
+#define UART_ALTR_TX_LOW 0x41
+#endif