kvm: Change prototype of kvm_update_guest_debug()

Passing a CPUState pointer instead of a CPUArchState pointer eliminates
the last target dependent data type in sysemu/kvm.h.

It also simplifies the code.

Signed-off-by: Stefan Weil <[email protected]>
Acked-by: Paolo Bonzini <[email protected]>
Signed-off-by: Andreas Färber <[email protected]>
diff --git a/kvm-stub.c b/kvm-stub.c
index 7b2233a..771360b 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -78,7 +78,7 @@
 {
 }
 
-int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap)
+int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
 {
     return -ENOSYS;
 }