target/riscv: Don't modify SUM with is_debug

If we want to give the debugger a greater view of memory than
the cpu, we should simply disable the access check entirely,
not simply for this one corner case.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Weiwei Li <liweiwei@iscas.ac.cn>
Tested-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-Id: <20230325105429.1142530-23-richard.henderson@linaro.org>
Message-Id: <20230412114333.118895-23-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu_helper.c

@@ -823,7 +823,7 @@ static int get_physical_address(CPURISCVState *env, hwaddr *physical,
         }
         widened = 2;
     }
-    sum = mmuidx_sum(mmu_idx) || is_debug;
+    sum = mmuidx_sum(mmu_idx);
     switch (vm) {
     case VM_1_10_SV32:
       levels = 2; ptidxbits = 10; ptesize = 4; break;