s390: remove arch specific smp_send_stop()

Impact: build fix on s390 !CONFIG_SMP

Remove arch specific smp_send_stop for !CONFIG_SMP since it conflicts
with a new generic version.
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
LKML-Reference: <20090320092410.30d2bac3@osiris.boeblingen.de.ibm.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/s390/include/asm/smp.h

@@ -97,12 +97,6 @@ extern void arch_send_call_function_ipi(cpumask_t mask);
 #endif
 
 #ifndef CONFIG_SMP
-static inline void smp_send_stop(void)
-{
-	/* Disable all interrupts/machine checks */
-	__load_psw_mask(psw_kernel_bits & ~PSW_MASK_MCHECK);
-}
-
 #define hard_smp_processor_id()		0
 #define smp_cpu_not_running(cpu)	1
 #endif