arm64: compat for clock_adjtime(2) is miswired

struct timex is different on arm and arm64; adjtimex(2) takes care to
convert, clock_adjtime(2) doesn't...
Signed-off-by: NAl Viro <viro@ZenIV.linux.org.uk>
Acked-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
Cc: <stable@vger.kernel.org>

arch/arm64/include/asm/unistd32.h

@@ -393,7 +393,7 @@ __SYSCALL(368, compat_sys_fanotify_mark_wrapper)
 __SYSCALL(369, sys_prlimit64)
 __SYSCALL(370, sys_name_to_handle_at)
 __SYSCALL(371, sys_open_by_handle_at)
-__SYSCALL(372, sys_clock_adjtime)
+__SYSCALL(372, compat_sys_clock_adjtime)
 __SYSCALL(373, sys_syncfs)
 
 #define __NR_compat_syscalls		374