x86: rename 'genapic' to 'apic'

Rename genapic-> to apic-> references because in a future chagne we'll
open-code all the indirect calls (instead of obscuring them via macros),
so we want this reference to be as short as possible.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/numaq_32.c b/arch/x86/kernel/numaq_32.c
index f2191d4..3928280 100644
--- a/arch/x86/kernel/numaq_32.c
+++ b/arch/x86/kernel/numaq_32.c
@@ -236,7 +236,7 @@
 
 static int __init numaq_update_genapic(void)
 {
-	genapic->wakeup_cpu = wakeup_secondary_cpu_via_nmi;
+	apic->wakeup_cpu = wakeup_secondary_cpu_via_nmi;
 
 	return 0;
 }