target/hppa: mask privilege bits in mfia

mfia should return only the iaoq bits without privilege
bits.

Fixes: 98a9cb7 ("target-hppa: Implement system and memory-management insns")
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Helge Deller <deller@gmx.de>
Message-Id: <20240319161921.487080-6-svens@stackframe.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/hppa/translate.c

@@ -2011,7 +2011,7 @@ static bool trans_mfia(DisasContext *ctx, arg_mfia *a)
 {
     unsigned rt = a->t;
     TCGv_i64 tmp = dest_gpr(ctx, rt);
-    tcg_gen_movi_i64(tmp, ctx->iaoq_f);
+    tcg_gen_movi_i64(tmp, ctx->iaoq_f & ~3ULL);
     save_gpr(ctx, rt, tmp);
 
     cond_free(&ctx->null_cond);