kvm fix compilation with GCC 4.3.4

As usual, SLES11's GCC complained about double typedefs:

/home/cohuck/git/qemu/kvm-all.c:110: error: redefinition of typedef ‘KVMState’
/home/cohuck/git/qemu/include/sysemu/kvm.h:161: error: previous declaration of ‘KVMState’ was here

Reported-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

kvm-all.c

@@ -71,7 +71,7 @@ typedef struct KVMSlot
 
 typedef struct kvm_dirty_log KVMDirtyLog;
 
-typedef struct KVMState
+struct KVMState
 {
     AccelState parent_obj;
 
@@ -107,7 +107,7 @@ typedef struct KVMState
     QTAILQ_HEAD(msi_hashtab, KVMMSIRoute) msi_hashtab[KVM_MSI_HASHTAB_SIZE];
     bool direct_msi;
 #endif
-} KVMState;
+};
 
 #define TYPE_KVM_ACCEL ACCEL_CLASS_NAME("kvm")