Update to v5.6 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.6

Add a new method for removing structures. This is to deal with the kernel
headers changing some definitions of timeval to __kernel_old_timeval
and itimerval to __kernel_old_itimerval. Remove the __kernel_old_XX
strutures and change the other structures to the previous definitions.

This only works so long as these structures stay the same, if they
diverge, then a different strategy will need to be implemented.

Test: Booted cuttlefish/walleye.
Test: Ran bionic-unit-tests on cuttlefish/walleye.
Change-Id: I0a61f4fa6e4155c602e0414d9b38c2e1637829af
diff --git a/libc/kernel/uapi/linux/mii.h b/libc/kernel/uapi/linux/mii.h
index 3c6c564..4ee4448 100644
--- a/libc/kernel/uapi/linux/mii.h
+++ b/libc/kernel/uapi/linux/mii.h
@@ -120,6 +120,16 @@
 #define NWAYTEST_RESV1 0x00ff
 #define NWAYTEST_LOOPBACK 0x0100
 #define NWAYTEST_RESV2 0xfe00
+#define ADVERTISE_SGMII 0x0001
+#define LPA_SGMII 0x0001
+#define LPA_SGMII_DPX_SPD_MASK 0x1C00
+#define LPA_SGMII_10HALF 0x0000
+#define LPA_SGMII_10FULL 0x1000
+#define LPA_SGMII_100HALF 0x0400
+#define LPA_SGMII_100FULL 0x1400
+#define LPA_SGMII_1000HALF 0x0800
+#define LPA_SGMII_1000FULL 0x1800
+#define LPA_SGMII_LINK 0x8000
 #define ADVERTISE_1000FULL 0x0200
 #define ADVERTISE_1000HALF 0x0100
 #define CTL1000_AS_MASTER 0x0800