x86, apic: refactor ->get_apic_id() & GET_APIC_ID()

- spread out the namespace on a per driver basis

 - get rid of macro wrappers

 - small cleanups

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/genx2apic_phys.c b/arch/x86/kernel/genx2apic_phys.c
index 2cb6f49..80cba49 100644
--- a/arch/x86/kernel/genx2apic_phys.c
+++ b/arch/x86/kernel/genx2apic_phys.c
@@ -140,7 +140,7 @@
 	return BAD_APICID;
 }
 
-static unsigned int get_apic_id(unsigned long x)
+static unsigned int x2apic_phys_get_apic_id(unsigned long x)
 {
 	unsigned int id;
 
@@ -203,7 +203,7 @@
 	.phys_pkg_id			= x2apic_phys_pkg_id,
 	.mps_oem_check			= NULL,
 
-	.get_apic_id			= get_apic_id,
+	.get_apic_id			= x2apic_phys_get_apic_id,
 	.set_apic_id			= set_apic_id,
 	.apic_id_mask			= 0xFFFFFFFFu,