s390/zcore: remove invalid kfree in init_cpu_info

The extended save area for the boot CPU has been allocated by
smp_save_dump_cpus() with memblock_alloc() and may not be freed
with kfree().

Signed-off-by: Martin Schwidefsky <[e-mail]>

drivers/s390/char/zcore.c

···
 	if (memcpy_hsa_kernel(&sa_ext->sa, sys_info.sa_base,
 			      sys_info.sa_size) < 0) {
 		TRACE("could not copy from HSA\n");
-		kfree(sa_ext);
 		return -EIO;
 	}
 	if (MACHINE_HAS_VX)