x86: use u32 for some lapic functions

Use u32 so 32 and 64bit have the same interface.

Andrew Morton: xen, lguest build fixes

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/apic_32.c

@@ -135,9 +135,9 @@ void apic_wait_icr_idle(void)
 		cpu_relax();
 }
 
-unsigned long safe_apic_wait_icr_idle(void)
+u32 safe_apic_wait_icr_idle(void)
 {
-	unsigned long send_status;
+	u32 send_status;
 	int timeout;
 
 	timeout = 0;