x86, apic: refactor ->cpu_mask_to_apicid*()

- spread out the namespace on a per driver basis

 - clean up the functions

 - get rid of macros

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mach-generic/bigsmp.c b/arch/x86/mach-generic/bigsmp.c
index ee52c59..22c2c7b 100644
--- a/arch/x86/mach-generic/bigsmp.c
+++ b/arch/x86/mach-generic/bigsmp.c
@@ -94,8 +94,8 @@
 	.set_apic_id			= NULL,
 	.apic_id_mask			= 0xFF << 24,
 
-	.cpu_mask_to_apicid		= cpu_mask_to_apicid,
-	.cpu_mask_to_apicid_and		= cpu_mask_to_apicid_and,
+	.cpu_mask_to_apicid		= bigsmp_cpu_mask_to_apicid,
+	.cpu_mask_to_apicid_and		= bigsmp_cpu_mask_to_apicid_and,
 
 	.send_IPI_mask			= send_IPI_mask,
 	.send_IPI_mask_allbutself	= NULL,