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/spi/spidev.h b/libc/kernel/uapi/linux/spi/spidev.h
index 343285b..dede0f0 100644
--- a/libc/kernel/uapi/linux/spi/spidev.h
+++ b/libc/kernel/uapi/linux/spi/spidev.h
@@ -36,6 +36,10 @@
 #define SPI_TX_QUAD 0x200
 #define SPI_RX_DUAL 0x400
 #define SPI_RX_QUAD 0x800
+#define SPI_CS_WORD 0x1000
+#define SPI_TX_OCTAL 0x2000
+#define SPI_RX_OCTAL 0x4000
+#define SPI_3WIRE_HIZ 0x8000
 #define SPI_IOC_MAGIC 'k'
 struct spi_ioc_transfer {
   __u64 tx_buf;