i386: hvf: cleanup x86_gen.h

This only includes VM_PANIC now.  No need to include it from headers.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/target/i386/hvf/x86_decode.c b/target/i386/hvf/x86_decode.c
index 71d0c3d..bf93e82 100644
--- a/target/i386/hvf/x86_decode.c
+++ b/target/i386/hvf/x86_decode.c
@@ -19,10 +19,10 @@
 #include "qemu/osdep.h"
 
 #include "qemu-common.h"
+#include "panic.h"
 #include "x86_decode.h"
 #include "string.h"
 #include "vmx.h"
-#include "x86_gen.h"
 #include "x86_mmu.h"
 #include "x86_descr.h"