x86, apic: remove genapic.h

Impact: cleanup

Remove genapic.h and remove all references to it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 3957776..f13ca16 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -8,7 +8,7 @@
 #include <linux/smp.h>
 #include <linux/ftrace.h>
 
-#include <asm/genapic.h>
+#include <asm/apic.h>
 #include <asm/io_apic.h>
 #include <asm/irq.h>
 #include <asm/idle.h>