KVM: PPC: E500: Remove E500_TLB_DIRTY flag

Since we always mark pages as dirty immediately when mapping them read/write
now, there's no need for the dirty flag in our cache.
Signed-off-by: Alexander Graf <agraf@suse.de>

arch/powerpc/kvm/e500.h

@@ -27,8 +27,7 @@
 #define E500_TLB_NUM   2
 
 #define E500_TLB_VALID 1
-#define E500_TLB_DIRTY 2
-#define E500_TLB_BITMAP 4
+#define E500_TLB_BITMAP 2
 
 struct tlbe_ref {
 	pfn_t pfn;

arch/powerpc/kvm/e500_tlb.c

@@ -303,10 +303,8 @@ static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref,
 	ref->pfn = pfn;
 	ref->flags = E500_TLB_VALID;
 
-	if (tlbe_is_writable(gtlbe)) {
-		ref->flags |= E500_TLB_DIRTY;
+	if (tlbe_is_writable(gtlbe))
 		kvm_set_pfn_dirty(pfn);
-	}
 }
 
 static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref)