target/rx: Replace MO_TE -> MO_LE

We only build the RX targets using little endianness order:

  $ git grep TARGET_BIG_ENDIAN configs/targets/rx-*
  $

Therefore the MO_TE definition always expands to MO_LE.
Use the latter to simplify.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20251009151607.26278-8-philmd@linaro.org>

target/rx/translate.c

@@ -74,7 +74,7 @@ static TCGv_i64 cpu_acc;
 
 static inline MemOp mo_endian(DisasContext *dc)
 {
-    return MO_TE;
+    return MO_LE;
 }
 
 /* decoder helper */