s390/syscalls: remove SYSCALL_METADATA() from compat syscalls

SYSCALL_METADATA() is only supposed to be used for non-compat system
calls. Otherwise there would be a name clash.

This also removes the inconsistency that s390 is the only architecture
which uses SYSCALL_METADATA() for compat system calls, and even that only
for compat system calls without parameters. Only two such compat system
calls exist.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/syscall_wrapper.h

@@ -72,7 +72,6 @@
  * named __s390x_sys_*()
  */
 #define COMPAT_SYSCALL_DEFINE0(sname)					\
-	SYSCALL_METADATA(_##sname, 0);					\
 	long __s390_compat_sys_##sname(void);				\
 	ALLOW_ERROR_INJECTION(__s390_compat_sys_##sname, ERRNO);	\
 	long __s390_compat_sys_##sname(void)