Update to v6.0 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-6.0

Test: Boots on coral.
Test: Bionic unit tests pass.
Change-Id: I282de83f23b432bef58214108a93700bdadddf0f
diff --git a/libc/kernel/uapi/asm-arm64/asm/hwcap.h b/libc/kernel/uapi/asm-arm64/asm/hwcap.h
index 95d21aa..442600d 100644
--- a/libc/kernel/uapi/asm-arm64/asm/hwcap.h
+++ b/libc/kernel/uapi/asm-arm64/asm/hwcap.h
@@ -82,4 +82,5 @@
 #define HWCAP2_SME_F32F32 (1 << 29)
 #define HWCAP2_SME_FA64 (1 << 30)
 #define HWCAP2_WFXT (1UL << 31)
+#define HWCAP2_EBF16 (1UL << 32)
 #endif