target/riscv: Remove redundant parentheses

Remove redundant parentheses in get_physical_address.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230327080858.39703-8-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/cpu_helper.c

@@ -1051,7 +1051,7 @@ static int get_physical_address(CPURISCVState *env, hwaddr *physical,
             if ((pte & PTE_R) || ((pte & PTE_X) && mxr)) {
                 *prot |= PAGE_READ;
             }
-            if ((pte & PTE_X)) {
+            if (pte & PTE_X) {
                 *prot |= PAGE_EXEC;
             }
             /* add write permission on stores or if the page is already dirty,