Update to v5.10 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.10

Test: Built cuttlefish and flame images. Ran bionic unit tests on both.
Change-Id: I37ffc850970adcce1febbe2269c202632fce763a
diff --git a/libc/kernel/uapi/linux/ethtool.h b/libc/kernel/uapi/linux/ethtool.h
index 3a2737a..238c2d9 100644
--- a/libc/kernel/uapi/linux/ethtool.h
+++ b/libc/kernel/uapi/linux/ethtool.h
@@ -682,6 +682,8 @@
   ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT = 87,
   ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT = 88,
   ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT = 89,
+  ETHTOOL_LINK_MODE_100baseFX_Half_BIT = 90,
+  ETHTOOL_LINK_MODE_100baseFX_Full_BIT = 91,
   __ETHTOOL_LINK_MODE_MASK_NBITS
 };
 #define __ETHTOOL_LINK_MODE_LEGACY_MASK(base_name) (1UL << (ETHTOOL_LINK_MODE_ ##base_name ##_BIT))