[ARM] Remove "ipimask" from do_IPI()

We don't practically use ipimask for anything anymore; remove it.

arch/arm/kernel/smp.c

@@ -314,14 +314,13 @@ static void ipi_cpu_stop(unsigned int cpu)
  *
  *  Bit 0 - Inter-processor function call
  */
-void do_IPI(unsigned int ipimask, struct pt_regs *regs)
+void do_IPI(struct pt_regs *regs)
 {
 	unsigned int cpu = smp_processor_id();
 	struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
 
 	ipi->ipi_count++;
 
-	if (ipimask & (1 << 0)) {
 	for (;;) {
 		unsigned long msgs;
 
@@ -367,15 +366,6 @@ void do_IPI(unsigned int ipimask, struct pt_regs *regs)
 			}
 		} while (msgs);
 	}
-
-		ipimask &= ~0x01;
-	}
-
-	if (ipimask) {
-		printk(KERN_CRIT "CPU %d: Unknown IPI signal %x!\n",
-		       cpu, ipimask);
-		BUG();
-	}
 }
 
 void smp_send_reschedule(int cpu)