KVM: arm64: nv: Make ps_to_output_size() generally available

Make this helper visible to at.c, we are going to need it.
Signed-off-by: Marc Zyngier <maz@kernel.org>

arch/arm64/include/asm/kvm_nested.h

@@ -227,4 +227,18 @@ static inline u64 kvm_encode_nested_level(struct kvm_s2_trans *trans)
 		shift;							\
 	})
 
+static inline unsigned int ps_to_output_size(unsigned int ps)
+{
+	switch (ps) {
+	case 0: return 32;
+	case 1: return 36;
+	case 2: return 40;
+	case 3: return 42;
+	case 4: return 44;
+	case 5:
+	default:
+		return 48;
+	}
+}
+
 #endif /* __ARM64_KVM_NESTED_H */

arch/arm64/kvm/nested.c

@@ -103,20 +103,6 @@ struct s2_walk_info {
 	bool	     be;
 };
 
-static unsigned int ps_to_output_size(unsigned int ps)
-{
-	switch (ps) {
-	case 0: return 32;
-	case 1: return 36;
-	case 2: return 40;
-	case 3: return 42;
-	case 4: return 44;
-	case 5:
-	default:
-		return 48;
-	}
-}
-
 static u32 compute_fsc(int level, u32 fsc)
 {
 	return fsc | (level & 0x3);