pseries: Fix use of global CPU state

Commit ed120055 (Implement PAPR VPA
functions for pSeries shared processor partitions) introduced the
deregister_dtl() function and typo "emv" as name of its argument.
This went unnoticed because the code in that function can access the
global variable "env" so that no build failure resulted.

Fix the argument to read "env". Resolves LP#986241.
Signed-off-by: NPeter Portante <peter.portante@redhat.com>
Acked-by: NAndreas Färber <afaerber@suse.de>
[agraf: fixed typo in commit message]
Signed-off-by: NAlexander Graf <agraf@suse.de>

hw/spapr_hcall.c

@@ -482,7 +482,7 @@ static target_ulong register_dtl(CPUPPCState *env, target_ulong addr)
     return H_SUCCESS;
 }
 
-static target_ulong deregister_dtl(CPUPPCState *emv, target_ulong addr)
+static target_ulong deregister_dtl(CPUPPCState *env, target_ulong addr)
 {
     env->dispatch_trace_log = 0;
     env->dtl_size = 0;