Update to v5.8 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.8

Test: NA
Change-Id: I2231c877589820fc09800a200cf4ac62ba74b04c
diff --git a/libc/kernel/uapi/linux/virtio_mem.h b/libc/kernel/uapi/linux/virtio_mem.h
new file mode 100644
index 0000000..854a2fe
--- /dev/null
+++ b/libc/kernel/uapi/linux/virtio_mem.h
@@ -0,0 +1,81 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_VIRTIO_MEM_H
+#define _LINUX_VIRTIO_MEM_H
+#include <linux/types.h>
+#include <linux/virtio_types.h>
+#include <linux/virtio_ids.h>
+#include <linux/virtio_config.h>
+#define VIRTIO_MEM_F_ACPI_PXM 0
+#define VIRTIO_MEM_REQ_PLUG 0
+#define VIRTIO_MEM_REQ_UNPLUG 1
+#define VIRTIO_MEM_REQ_UNPLUG_ALL 2
+#define VIRTIO_MEM_REQ_STATE 3
+struct virtio_mem_req_plug {
+  __virtio64 addr;
+  __virtio16 nb_blocks;
+  __virtio16 padding[3];
+};
+struct virtio_mem_req_unplug {
+  __virtio64 addr;
+  __virtio16 nb_blocks;
+  __virtio16 padding[3];
+};
+struct virtio_mem_req_state {
+  __virtio64 addr;
+  __virtio16 nb_blocks;
+  __virtio16 padding[3];
+};
+struct virtio_mem_req {
+  __virtio16 type;
+  __virtio16 padding[3];
+  union {
+    struct virtio_mem_req_plug plug;
+    struct virtio_mem_req_unplug unplug;
+    struct virtio_mem_req_state state;
+  } u;
+};
+#define VIRTIO_MEM_RESP_ACK 0
+#define VIRTIO_MEM_RESP_NACK 1
+#define VIRTIO_MEM_RESP_BUSY 2
+#define VIRTIO_MEM_RESP_ERROR 3
+#define VIRTIO_MEM_STATE_PLUGGED 0
+#define VIRTIO_MEM_STATE_UNPLUGGED 1
+#define VIRTIO_MEM_STATE_MIXED 2
+struct virtio_mem_resp_state {
+  __virtio16 state;
+};
+struct virtio_mem_resp {
+  __virtio16 type;
+  __virtio16 padding[3];
+  union {
+    struct virtio_mem_resp_state state;
+  } u;
+};
+struct virtio_mem_config {
+  __u64 block_size;
+  __u16 node_id;
+  __u8 padding[6];
+  __u64 addr;
+  __u64 region_size;
+  __u64 usable_region_size;
+  __u64 plugged_size;
+  __u64 requested_size;
+};
+#endif