x86, apic: clean up check_apicid*() callbacks

Clean up these methods - to make it clearer which function is
used in which case.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/include/asm/bigsmp/apic.h b/arch/x86/include/asm/bigsmp/apic.h
index 7e6e33a..bd52d4d 100644
--- a/arch/x86/include/asm/bigsmp/apic.h
+++ b/arch/x86/include/asm/bigsmp/apic.h
@@ -20,14 +20,15 @@
 #define APIC_DFR_VALUE		(APIC_DFR_FLAT)
 #define NO_BALANCE_IRQ		(0)
 
-static inline unsigned long check_apicid_used(physid_mask_t bitmap, int apicid)
+static inline unsigned long
+bigsmp_check_apicid_used(physid_mask_t bitmap, int apicid)
 {
-	return (0);
+	return 0;
 }
 
-static inline unsigned long check_apicid_present(int bit)
+static inline unsigned long bigsmp_check_apicid_present(int bit)
 {
-	return (1);
+	return 1;
 }
 
 static inline unsigned long calculate_ldr(int cpu)