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/ipi.c b/arch/x86/kernel/ipi.c
index 1326272..dbf5445 100644
--- a/arch/x86/kernel/ipi.c
+++ b/arch/x86/kernel/ipi.c
@@ -15,7 +15,7 @@
 #include <asm/mtrr.h>
 #include <asm/tlbflush.h>
 #include <asm/mmu_context.h>
-#include <asm/genapic.h>
+#include <asm/apic.h>
 #include <asm/proto.h>
 #include <asm/ipi.h>