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/mtd/mtd-abi.h b/libc/kernel/uapi/mtd/mtd-abi.h
index e1e0d59..680ac1e 100644
--- a/libc/kernel/uapi/mtd/mtd-abi.h
+++ b/libc/kernel/uapi/mtd/mtd-abi.h
@@ -64,6 +64,7 @@
 #define MTD_BIT_WRITEABLE 0x800
 #define MTD_NO_ERASE 0x1000
 #define MTD_POWERUP_LOCK 0x2000
+#define MTD_SLC_ON_MLC_EMULATION 0x4000
 #define MTD_CAP_ROM 0
 #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
 #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)