Revert "Update to v6.11 kernel headers."

Revert submission 3277111-kernel_611

Reason for revert: Droidmonitor created revert due to b/369448759.

Reverted changes: /q/submissionid:3277111-kernel_611

Change-Id: I3cabcc2c55904459c69dbfa81e6e65863a7e57cc
diff --git a/libc/kernel/uapi/asm-riscv/asm/unistd.h b/libc/kernel/uapi/asm-riscv/asm/unistd.h
index f395f71..0c58887 100644
--- a/libc/kernel/uapi/asm-riscv/asm/unistd.h
+++ b/libc/kernel/uapi/asm-riscv/asm/unistd.h
@@ -4,9 +4,18 @@
  * See https://android.googlesource.com/platform/bionic/+/master/libc/kernel/
  * for more information.
  */
-#include <asm/bitsperlong.h>
-#if __BITS_PER_LONG == 64
-#include <asm/unistd_64.h>
-#else
-#include <asm/unistd_32.h>
+#if defined(__LP64__) && !defined(__SYSCALL_COMPAT)
+#define __ARCH_WANT_NEW_STAT
+#define __ARCH_WANT_SET_GET_RLIMIT
 #endif
+#define __ARCH_WANT_SYS_CLONE3
+#define __ARCH_WANT_MEMFD_SECRET
+#include <asm-generic/unistd.h>
+#ifndef __NR_riscv_flush_icache
+#define __NR_riscv_flush_icache (__NR_arch_specific_syscall + 15)
+#endif
+__SYSCALL(__NR_riscv_flush_icache, sys_riscv_flush_icache)
+#ifndef __NR_riscv_hwprobe
+#define __NR_riscv_hwprobe (__NR_arch_specific_syscall + 14)
+#endif
+__SYSCALL(__NR_riscv_hwprobe, sys_riscv_hwprobe)