[PATCH] s390: core fixes.

[PATCH] s390: core fixes.

From: Martin Schwidefsky <schwidefsky@de.ibm.com>

s390 core changes:
 - Fix return type of some system call functions (long vs. int).
 - Fix prototypes for compat system call handlers.
 - Correct some bugs in the compat system call wrappers.
 - Fix broken pointer arithmetic which causes problems with
   gcc 3.4 and -march=z990
 - Remove unnecessary #ifndef & optimize inline assemblies in spinlock.h.
 - Improve handling of deferred condition code 1.
 - New default configuration.