target/rx: Fix some comment spelling errors

There are many spelling errors in the comments of target/rx.
Use spellcheck to check the spelling errors, then fix them.

Signed-off-by: zhaolichang <zhaolichang@huawei.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Philippe <Mathieu-Daude&lt;f4bug@amsat.org>
Message-Id: <20201009064449.2336-5-zhaolichang@huawei.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

target/rx/op_helper.c

@@ -318,7 +318,7 @@ void helper_swhile(CPURXState *env, uint32_t sz)
     env->psw_c = (tmp <= env->regs[2]);
 }
 
-/* accumlator operations */
+/* accumulator operations */
 void helper_rmpa(CPURXState *env, uint32_t sz)
 {
     uint64_t result_l, prev;

target/rx/translate.c

@@ -1089,7 +1089,7 @@ static void rx_sub(TCGv ret, TCGv arg1, TCGv arg2)
     tcg_gen_xor_i32(temp, arg1, arg2);
     tcg_gen_and_i32(cpu_psw_o, cpu_psw_o, temp);
     tcg_temp_free_i32(temp);
-    /* CMP not requred return */
+    /* CMP not required return */
     if (ret) {
         tcg_gen_mov_i32(ret, cpu_psw_s);
     }