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/usb/charger.h b/libc/kernel/uapi/linux/usb/charger.h
index 0810aab..e53f7d6 100644
--- a/libc/kernel/uapi/linux/usb/charger.h
+++ b/libc/kernel/uapi/linux/usb/charger.h
@@ -19,15 +19,15 @@
 #ifndef _UAPI__LINUX_USB_CHARGER_H
 #define _UAPI__LINUX_USB_CHARGER_H
 enum usb_charger_type {
-  UNKNOWN_TYPE,
-  SDP_TYPE,
-  DCP_TYPE,
-  CDP_TYPE,
-  ACA_TYPE,
+  UNKNOWN_TYPE = 0,
+  SDP_TYPE = 1,
+  DCP_TYPE = 2,
+  CDP_TYPE = 3,
+  ACA_TYPE = 4,
 };
 enum usb_charger_state {
-  USB_CHARGER_DEFAULT,
-  USB_CHARGER_PRESENT,
-  USB_CHARGER_ABSENT,
+  USB_CHARGER_DEFAULT = 0,
+  USB_CHARGER_PRESENT = 1,
+  USB_CHARGER_ABSENT = 2,
 };
 #endif